Notice of Expiration of Patents
                     Due to Failure to Pay Maintenance Fee

   35 U.S.C. 41 and 37 CFR 1.362(g) provide that if the required
maintenance fee and any applicable surcharge are not paid in a patent
requiring such payment, the patent will expire at the end of the 4th, 8th
or 12th anniversary of the grant of the patent depending on the first
maintenance fee which was not paid.
   According to the records of the Office, the patents listed below have
expired due to failure to pay the required maintenance fee and any
applicable surcharge.

                  PATENTS WHICH EXPIRED ON December 27, 2000
                     DUE TO FAILURE TO PAY MAINTENACE FEES

Patent                            Serial                            Issue
Number                            Number                             Date

4,793,014                       07/095,227                       12/27/88
4,793,015                       07/094,303                       12/27/88
4,793,024                       07/021,049                       12/27/88
4,793,029                       07/157,534                       12/27/88
4,793,035                       07/103,104                       12/27/88
4,793,039                       07/089,986                       12/27/88
4,793,041                       07/132,716                       12/27/88
4,793,044                       07/044,254                       12/27/88
4,793,049                       07/117,663                       12/27/88
4,793,055                       06/924,218                       12/27/88
4,793,058                       06/859,127                       12/27/88
4,793,062                       06/921,774                       12/27/88
4,793,076                       07/059,948                       12/27/88
4,793,077                       06/942,898                       12/27/88
4,793,082                       07/098,898                       12/27/88
4,793,085                       07/007,881                       12/27/88
4,793,090                       07/179,573                       12/27/88
4,793,121                       07/000,215                       12/27/88
4,793,122                       06/443,608                       12/27/88
4,793,123                       07/120,655                       12/27/88
4,793,134                       07/114,731                       12/27/88
4,793,147                       07/096,580                       12/27/88
4,793,149                       07/078,585                       12/27/88
4,793,150                       07/193,558                       12/27/88
4,793,151                       07/033,434                       12/27/88
4,793,155                       07/055,593                       12/27/88
4,793,159                       07/083,206                       12/27/88
4,793,189                       07/115,557                       12/27/88
4,793,192                       06/926,405                       12/27/88
4,793,200                       07/122,966                       12/27/88
4,793,202                       06/785,468                       12/27/88
4,793,207                       07/055,268                       12/27/88
4,793,208                       06/934,632                       12/27/88
4,793,209                       07/038,326                       12/27/88
4,793,214                       06/931,547                       12/27/88
4,793,226                       07/021,154                       12/27/88
4,793,231                       07/021,403                       12/27/88
4,793,232                       06/865,267                       12/27/88
4,793,238                       07/068,494                       12/27/88
4,793,242                       07/118,191                       12/27/88
4,793,243                       07/079,896                       12/27/88
4,793,255                       07/173,571                       12/27/88
4,793,268                       07/125,926                       12/27/88
4,793,277                       07/112,509                       12/27/88
4,793,285                       06/928,547                       12/27/88
4,793,290                       07/119,963                       12/27/88
4,793,292                       07/072,597                       12/27/88
4,793,293                       07/021,838                       12/27/88
4,793,302                       07/040,511                       12/27/88
4,793,303                       07/013,920                       12/27/88
4,793,314                       07/092,204                       12/27/88
4,793,315                       06/753,431                       12/27/88
4,793,321                       07/043,436                       12/27/88
4,793,325                       07/078,360                       12/27/88
4,793,331                       07/152,870                       12/27/88
4,793,333                       06/857,918                       12/27/88
4,793,336                       06/938,284                       12/27/88
4,793,364                       06/827,604                       12/27/88
4,793,374                       07/038,868                       12/27/88
4,793,379                       07/127,634                       12/27/88
4,793,393                       07/108,017                       12/27/88
4,793,400                       07/124,746                       12/27/88
4,793,404                       07/091,853                       12/27/88
4,793,418                       07/081,052                       12/27/88
4,793,419                       07/140,368                       12/27/88
4,793,427                       07/007,011                       12/27/88
4,793,432                       07/103,298                       12/27/88
4,793,433                       07/074,798                       12/27/88
4,793,437                       07/075,410                       12/27/88
4,793,441                       07/110,408                       12/27/88
4,793,453                       07/025,763                       12/27/88
4,793,458                       07/118,664                       12/27/88
4,793,465                       07/079,561                       12/27/88
4,793,466                       06/907,789                       12/27/88
4,793,480                       06/942,266                       12/27/88
4,793,503                       06/450,531                       12/27/88
4,793,504                       06/531,007                       12/27/88
4,793,505                       06/462,085                       12/27/88
4,793,507                       07/037,689                       12/27/88
4,793,509                       07/155,494                       12/27/88
4,793,530                       07/043,713                       12/27/88
4,793,534                       07/119,681                       12/27/88
4,793,542                       07/138,050                       12/27/88
4,793,549                       07/159,155                       12/27/88
4,793,555                       07/184,727                       12/27/88
4,793,560                       07/061,434                       12/27/88
4,793,561                       06/381,432                       12/27/88
4,793,567                       07/108,228                       12/27/88
4,793,568                       07/116,006                       12/27/88
4,793,569                       07/113,876                       12/27/88
4,793,575                       07/045,044                       12/27/88
4,793,579                       07/155,992                       12/27/88
4,793,581                       06/687,856                       12/27/88
4,793,583                       07/164,446                       12/27/88
4,793,584                       07/061,675                       12/27/88
4,793,588                       07/183,042                       12/27/88
4,793,589                       07/064,203                       12/27/88
4,793,614                       07/119,804                       12/27/88
4,793,617                       07/080,939                       12/27/88
4,793,623                       06/927,333                       12/27/88
4,793,630                       07/034,611                       12/27/88
4,793,632                       06/934,024                       12/27/88
4,793,640                       06/925,054                       12/27/88
4,793,649                       07/055,367                       12/27/88
4,793,659                       06/937,345                       12/27/88
4,793,663                       07/073,487                       12/27/88
4,793,667                       07/159,478                       12/27/88
4,793,672                       07/035,974                       12/27/88
4,793,678                       06/864,923                       12/27/88
4,793,681                       07/182,659                       12/27/88
4,793,682                       07/141,818                       12/27/88
4,793,684                       07/087,589                       12/27/88
4,793,688                       07/053,481                       12/27/88
4,793,690                       07/043,210                       12/27/88
4,793,701                       07/075,944                       12/27/88
4,793,702                       06/897,910                       12/27/88
4,793,710                       07/059,892                       12/27/88
4,793,727                       07/052,304                       12/27/88
4,793,730                       06/639,745                       12/27/88
4,793,733                       07/070,722                       12/27/88
4,793,736                       07/122,534                       12/27/88
4,793,739                       07/064,338                       12/27/88
4,793,748                       07/048,569                       12/27/88
4,793,749                       07/020,112                       12/27/88
4,793,751                       07/079,431                       12/27/88
4,793,766                       07/163,626                       12/27/88
4,793,787                       07/146,602                       12/27/88
4,793,789                       07/121,479                       12/27/88
4,793,797                       07/095,617                       12/27/88
4,793,808                       06/865,680                       12/27/88
4,793,809                       07/052,843                       12/27/88
4,793,814                       06/887,260                       12/27/88
4,793,816                       07/075,592                       12/27/88
4,793,820                       07/135,649                       12/27/88
4,793,821                       06/832,403                       12/27/88
4,793,827                       07/018,378                       12/27/88
4,793,830                       07/137,899                       12/27/88
4,793,839                       07/127,427                       12/27/88
4,793,865                       07/087,497                       12/27/88
4,793,867                       06/912,754                       12/27/88
4,793,877                       07/055,096                       12/27/88
4,793,879                       07/131,199                       12/27/88
4,793,889                       07/162,255                       12/27/88
4,793,891                       07/027,374                       12/27/88
4,793,901                       07/180,129                       12/27/88
4,793,902                       07/164,070                       12/27/88
4,793,905                       07/138,961                       12/27/88
4,793,907                       06/898,084                       12/27/88
4,793,915                       07/003,677                       12/27/88
4,793,919                       06/820,892                       12/27/88
4,793,922                       07/048,649                       12/27/88
4,793,923                       07/145,696                       12/27/88
4,793,925                       06/877,250                       12/27/88
4,793,928                       07/015,856                       12/27/88
4,793,929                       07/053,966                       12/27/88
4,793,932                       07/010,089                       12/27/88
4,793,940                       07/159,491                       12/27/88
4,793,947                       06/852,821                       12/27/88
4,793,951                       07/053,327                       12/27/88
4,793,952                       07/006,914                       12/27/88
4,793,953                       07/109,228                       12/27/88
4,793,978                       07/005,083                       12/27/88
4,794,017                       06/921,457                       12/27/88
4,794,019                       07/115,579                       12/27/88
4,794,021                       06/930,166                       12/27/88
4,794,023                       07/074,837                       12/27/88
4,794,035                       07/093,205                       12/27/88
4,794,037                       07/014,119                       12/27/88
4,794,039                       07/092,920                       12/27/88
4,794,042                       06/917,224                       12/27/88
4,794,043                       06/854,607                       12/27/88
4,794,047                       07/075,524                       12/27/88
4,794,052                       07/159,205                       12/27/88
4,794,058                       07/072,112                       12/27/88
4,794,062                       07/016,716                       12/27/88
4,794,067                       07/123,884                       12/27/88
4,794,072                       07/159,794                       12/27/88
4,794,074                       06/778,669                       12/27/88
4,794,084                       07/011,478                       12/27/88
4,794,087                       06/940,879                       12/27/88
4,794,097                       07/072,552                       12/27/88
4,794,112                       06/829,571                       12/27/88
4,794,116                       07/076,450                       12/27/88
4,794,117                       07/103,451                       12/27/88
4,794,118                       06/887,720                       12/27/88
4,794,124                       06/929,305                       12/27/88
4,794,126                       07/188,988                       12/27/88
4,794,131                       07/003,350                       12/27/88
4,794,137                       06/889,983                       12/27/88
4,794,139                       06/910,054                       12/27/88
4,794,141                       06/940,874                       12/27/88
4,794,151                       07/035,919                       12/27/88
4,794,152                       06/827,213                       12/27/88
4,794,158                       07/130,241                       12/27/88
4,794,159                       07/041,249                       12/27/88
4,794,165                       07/135,426                       12/27/88
4,794,169                       07/030,959                       12/27/88
4,794,176                       06/918,935                       12/27/88
4,794,181                       06/819,439                       12/27/88
4,794,195                       07/026,322                       12/27/88
4,794,202                       06/723,582                       12/27/88
4,794,205                       06/940,675                       12/27/88
4,794,208                       07/152,993                       12/27/88
4,794,210                       07/079,882                       12/27/88
4,794,214                       07/114,184                       12/27/88
4,794,220                       07/027,727                       12/27/88
4,794,223                       07/087,819                       12/27/88
4,794,225                       07/106,399                       12/27/88
4,794,229                       07/042,177                       12/27/88
4,794,231                       07/137,682                       12/27/88
4,794,238                       07/107,565                       12/27/88
4,794,242                       07/125,634                       12/27/88
4,794,253                       07/061,464                       12/27/88
4,794,255                       06/935,301                       12/27/88
4,794,256                       06/824,418                       12/27/88
4,794,260                       06/933,032                       12/27/88
4,794,268                       07/064,006                       12/27/88
4,794,273                       07/102,324                       12/27/88
4,794,288                       07/144,544                       12/27/88
4,794,289                       06/891,397                       12/27/88
4,794,302                       06/947,782                       12/27/88
4,794,310                       07/040,427                       12/27/88
4,794,319                       06/881,602                       12/27/88
4,794,334                       07/002,601                       12/27/88
4,794,339                       06/793,944                       12/27/88
4,794,341                       06/926,529                       12/27/88
4,794,352                       07/103,728                       12/27/88
4,794,353                       07/137,947                       12/27/88
4,794,357                       07/079,460                       12/27/88
4,794,363                       07/105,032                       12/27/88
4,794,366                       06/929,557                       12/27/88
4,794,369                       06/660,380                       12/27/88
4,794,381                       06/904,711                       12/27/88
4,794,385                       06/910,103                       12/27/88
4,794,389                       06/919,654                       12/27/88
4,794,397                       06/786,865                       12/27/88
4,794,398                       06/913,890                       12/27/88
4,794,400                       07/099,365                       12/27/88
4,794,403                       07/035,448                       12/27/88
4,794,407                       07/119,509                       12/27/88
4,794,420                       07/126,115                       12/27/88
4,794,445                       07/078,999                       12/27/88
4,794,446                       06/923,081                       12/27/88
4,794,450                       07/090,477                       12/27/88
4,794,466                       07/094,783                       12/27/88
4,794,469                       07/075,964                       12/27/88
4,794,472                       06/889,858                       12/27/88
4,794,475                       06/901,488                       12/27/88
4,794,483                       06/918,339                       12/27/88
4,794,488                       07/102,237                       12/27/88
4,794,490                       07/100,186                       12/27/88
4,794,492                       07/031,838                       12/27/88
4,794,493                       07/080,634                       12/27/88
4,794,497                       07/121,877                       12/27/88
4,794,511                       07/142,792                       12/27/88
4,794,513                       06/836,839                       12/27/88
4,794,516                       06/794,354                       12/27/88
4,794,525                       07/013,227                       12/27/88
4,794,529                       06/895,954                       12/27/88
4,794,532                       06/929,548                       12/27/88
4,794,537                       07/044,006                       12/27/88
4,794,544                       07/031,110                       12/27/88
4,794,550                       06/918,950                       12/27/88
4,794,561                       07/069,168                       12/27/88
4,794,581                       07/066,380                       12/27/88
4,794,589                       06/908,111                       12/27/88
4,794,590                       06/892,146                       12/27/88
4,794,591                       07/137,904                       12/27/88
4,794,595                       07/051,858                       12/27/88
4,794,597                       06/945,530                       12/27/88
4,794,601                       06/944,806                       12/27/88
4,794,604                       07/067,901                       12/27/88
4,794,615                       07/062,140                       12/27/88
4,794,620                       06/628,460                       12/27/88
4,794,623                       07/063,703                       12/27/88
4,794,625                       07/149,330                       12/27/88
4,794,627                       06/326,546                       12/27/88
4,794,629                       07/050,323                       12/27/88
4,794,630                       06/929,274                       12/27/88
4,794,632                       07/052,446                       12/27/88

                  PATENTS WHICH EXPIRED ON December 22, 2000
                     DUE TO FAILURE TO PAY MAINTENACE FEES

Patent                            Serial                            Issue
Number                            Number                             Date

5,172,424                       07/646,464                       12/22/92
5,172,429                       07/714,496                       12/22/92
5,172,430                       07/791,356                       12/22/92
5,172,433                       07/759,531                       12/22/92
5,172,436                       07/768,308                       12/22/92
5,172,437                       07/660,604                       12/22/92
5,172,438                       07/746,279                       12/22/92
5,172,440                       07/914,010                       12/22/92
5,172,456                       07/626,535                       12/22/92
5,172,463                       07/818,906                       12/22/92
5,172,474                       07/833,535                       12/22/92
5,172,477                       07/763,311                       12/22/92
5,172,479                       07/757,630                       12/22/92
5,172,481                       07/223,240                       12/22/92
5,172,483                       07/824,079                       12/22/92
5,172,489                       07/693,717                       12/22/92
5,172,492                       07/423,641                       12/22/92
5,172,498                       07/731,668                       12/22/92
5,172,511                       07/643,365                       12/22/92
5,172,515                       07/606,427                       12/22/92
5,172,517                       07/730,601                       12/22/92
5,172,519                       07/730,547                       12/22/92
5,172,520                       07/760,123                       12/22/92
5,172,522                       07/802,888                       12/22/92
5,172,531                       07/600,193                       12/22/92
5,172,536                       07/798,909                       12/22/92
5,172,547                       07/693,464                       12/22/92
5,172,553                       07/823,420                       12/22/92
5,172,554                       07/679,498                       12/22/92
5,172,555                       07/782,145                       12/22/92
5,172,556                       07/612,448                       12/22/92
5,172,558                       07/613,828                       12/22/92
5,172,563                       07/712,042                       12/22/92
5,172,568                       07/659,356                       12/22/92
5,172,579                       07/700,178                       12/22/92
5,172,584                       07/634,324                       12/22/92
5,172,591                       07/569,305                       12/22/92
5,172,611                       07/768,641                       12/22/92
5,172,617                       07/641,154                       12/22/92
5,172,622                       07/791,019                       12/22/92
5,172,625                       07/787,666                       12/22/92
5,172,639                       07/675,487                       12/22/92
5,172,647                       07/766,808                       12/22/92
5,172,648                       07/623,519                       12/22/92
5,172,650                       07/791,142                       12/22/92
5,172,672                       07/859,931                       12/22/92
5,172,673                       07/686,331                       12/22/92
5,172,675                       07/862,353                       12/22/92
5,172,676                       07/778,990                       12/22/92
5,172,678                       07/842,624                       12/22/92
5,172,681                       07/635,082                       12/22/92
5,172,685                       07/835,021                       12/22/92
5,172,689                       07/486,782                       12/22/92
5,172,710                       07/306,400                       12/22/92
5,172,716                       07/723,959                       12/22/92
5,172,721                       07/833,337                       12/22/92
5,172,722                       07/758,666                       12/22/92
5,172,730                       07/831,629                       12/22/92
5,172,738                       07/582,324                       12/22/92
5,172,739                       07/776,570                       12/22/92
5,172,743                       07/801,792                       12/22/92
5,172,752                       07/775,011                       12/22/92
5,172,756                       07/720,216                       12/22/92
5,172,757                       07/885,777                       12/22/92
5,172,763                       07/752,855                       12/22/92
5,172,770                       07/673,641                       12/22/92
5,172,776                       07/689,376                       12/22/92
5,172,788                       07/640,949                       12/22/92
5,172,795                       07/571,098                       12/22/92
5,172,796                       07/853,560                       12/22/92
5,172,800                       07/704,349                       12/22/92
5,172,803                       07/783,882                       12/22/92
5,172,817                       07/809,384                       12/22/92
5,172,826                       07/811,270                       12/22/92
5,172,836                       07/712,019                       12/22/92
5,172,838                       07/705,107                       12/22/92
5,172,840                       07/795,229                       12/22/92
5,172,843                       07/524,050                       12/22/92
5,172,845                       07/684,224                       12/22/92
5,172,851                       07/761,717                       12/22/92
5,172,852                       07/877,003                       12/22/92
5,172,870                       07/570,243                       12/22/92
5,172,872                       07/561,871                       12/22/92
5,172,874                       07/721,528                       12/22/92
5,172,881                       07/715,393                       12/22/92
5,172,885                       07/674,206                       12/22/92
5,172,893                       07/669,885                       12/22/92
5,172,896                       07/895,718                       12/22/92
5,172,903                       07/765,569                       12/22/92
5,172,905                       07/717,617                       12/22/92
5,172,908                       07/675,569                       12/22/92
5,172,910                       07/743,971                       12/22/92
5,172,914                       07/807,330                       12/22/92
5,172,915                       07/822,901                       12/22/92
5,172,930                       07/665,565                       12/22/92
5,172,938                       07/615,309                       12/22/92
5,172,947                       07/640,672                       12/22/92
5,172,948                       07/793,541                       12/22/92
5,172,951                       07/563,399                       12/22/92
5,172,954                       07/803,731                       12/22/92
5,172,955                       07/662,273                       12/22/92
5,172,966                       07/710,747                       12/22/92
5,172,968                       07/693,312                       12/22/92
5,172,975                       07/874,416                       12/22/92
5,172,977                       07/816,719                       12/22/92
5,172,981                       07/703,913                       12/22/92
5,172,985                       07/816,738                       12/22/92
5,173,002                       07/435,607                       12/22/92
5,173,009                       07/817,905                       12/22/92
5,173,013                       07/843,035                       12/22/92
5,173,019                       07/740,454                       12/22/92
5,173,020                       07/656,537                       12/22/92
5,173,028                       07/768,873                       12/22/92
5,173,029                       07/730,488                       12/22/92
5,173,030                       07/746,188                       12/22/92
5,173,033                       07/797,656                       12/22/92
5,173,048                       07/685,550                       12/22/92
5,173,049                       07/846,662                       12/22/92
5,173,051                       07/776,174                       12/22/92
5,173,052                       07/760,933                       12/22/92
5,173,057                       07/832,378                       12/22/92
5,173,058                       07/348,612                       12/22/92
5,173,059                       07/731,788                       12/22/92
5,173,067                       07/833,983                       12/22/92
5,173,069                       07/799,679                       12/22/92
5,173,071                       07/764,521                       12/22/92
5,173,072                       07/745,670                       12/22/92
5,173,079                       07/661,345                       12/22/92
5,173,094                       07/693,381                       12/22/92
5,173,099                       07/706,844                       12/22/92
5,173,104                       07/592,032                       12/22/92
5,173,105                       07/650,525                       12/22/92
5,173,110                       07/850,769                       12/22/92
5,173,115                       07/726,858                       12/22/92
5,173,116                       07/871,077                       12/22/92
5,173,128                       07/784,163                       12/22/92
5,173,129                       07/448,059                       12/22/92
5,173,137                       07/700,273                       12/22/92
5,173,140                       07/559,696                       12/22/92
5,173,142                       07/732,618                       12/22/92
5,173,143                       07/575,129                       12/22/92
5,173,144                       07/544,875                       12/22/92
5,173,146                       07/722,507                       12/22/92
5,173,150                       07/689,428                       12/22/92
5,173,156                       07/803,509                       12/22/92
5,173,157                       07/618,250                       12/22/92
5,173,159                       07/805,138                       12/22/92
5,173,163                       07/463,357                       12/22/92
5,173,164                       07/580,959                       12/22/92
5,173,173                       07/589,671                       12/22/92
5,173,176                       07/800,172                       12/22/92
5,173,180                       07/623,074                       12/22/92
5,173,192                       07/821,462                       12/22/92
5,173,199                       07/735,244                       12/22/92
5,173,201                       07/771,892                       12/22/92
5,173,202                       07/633,613                       12/22/92
5,173,203                       07/693,840                       12/22/92
5,173,205                       07/810,288                       12/22/92
5,173,206                       07/645,426                       12/22/92
5,173,209                       07/581,900                       12/22/92
5,173,216                       07/768,392                       12/22/92
5,173,225                       07/520,050                       12/22/92
5,173,226                       07/608,648                       12/22/92
5,173,227                       07/623,822                       12/22/92
5,173,237                       07/469,164                       12/22/92
5,173,239                       07/751,850                       12/22/92
5,173,240                       07/692,162                       12/22/92
5,173,243                       07/560,598                       12/22/92
5,173,244                       07/722,524                       12/22/92
5,173,247                       07/418,495                       12/22/92
5,173,252                       07/702,643                       12/22/92
5,173,254                       07/787,028                       12/22/92
5,173,256                       07/790,904                       12/22/92
5,173,263                       07/643,318                       12/22/92
5,173,264                       07/499,602                       12/22/92
5,173,275                       07/714,289                       12/22/92
5,173,277                       07/659,243                       12/22/92
5,173,278                       07/669,821                       12/22/92
5,173,281                       07/772,178                       12/22/92
5,173,282                       07/771,573                       12/22/92
5,173,292                       07/212,312                       12/22/92
5,173,293                       07/314,731                       12/22/92
5,173,299                       07/772,398                       12/22/92
5,173,302                       07/590,648                       12/22/92
5,173,310                       07/639,034                       12/22/92
5,173,312                       07/777,485                       12/22/92
5,173,314                       07/845,261                       12/22/92
5,173,315                       07/604,548                       12/22/92
5,173,320                       07/881,050                       12/22/92
5,173,321                       07/690,457                       12/22/92
5,173,323                       07/736,454                       12/22/92
5,173,331                       07/744,621                       12/22/92
5,173,340                       07/651,630                       12/22/92
5,173,345                       07/730,591                       12/22/92
5,173,347                       07/782,741                       12/22/92
5,173,348                       07/609,998                       12/22/92
5,173,349                       07/567,995                       12/22/92
5,173,358                       07/749,885                       12/22/92
5,173,360                       07/768,326                       12/22/92
5,173,361                       07/642,501                       12/22/92
5,173,362                       07/654,206                       12/22/92
5,173,368                       07/244,204                       12/22/92
5,173,382                       07/462,589                       12/22/92
5,173,392                       07/863,114                       12/22/92
5,173,396                       07/814,314                       12/22/92
5,173,398                       07/783,893                       12/22/92
5,173,412                       07/788,375                       12/22/92
5,173,417                       07/391,017                       12/22/92
5,173,420                       07/310,654                       12/22/92
5,173,428                       07/678,587                       12/22/92
5,173,431                       07/790,429                       12/22/92
5,173,432                       07/257,362                       12/22/92
5,173,434                       07/609,278                       12/22/92
5,173,443                       07/544,772                       12/22/92
5,173,455                       07/696,087                       12/22/92
5,173,457                       07/614,128                       12/22/92
5,173,458                       07/810,723                       12/22/92
5,173,460                       07/782,030                       12/22/92
5,173,468                       07/729,169                       12/22/92
5,173,476                       07/252,698                       12/22/92
5,173,478                       07/667,925                       12/22/92
5,173,479                       07/765,940                       12/22/92
5,173,482                       07/624,078                       12/22/92
5,173,483                       07/578,894                       12/22/92
5,173,490                       07/817,666                       12/22/92
5,173,495                       07/564,502                       12/22/92
5,173,497                       07/765,795                       12/22/92
5,173,500                       07/700,976                       12/22/92
5,173,502                       07/786,280                       12/22/92
5,173,503                       07/606,699                       12/22/92
5,173,507                       07/832,662                       12/22/92
5,173,509                       07/500,913                       12/22/92
5,173,514                       07/789,454                       12/22/92
5,173,519                       07/613,840                       12/22/92
5,173,521                       07/715,199                       12/22/92
5,173,531                       07/661,510                       12/22/92
5,173,536                       07/625,543                       12/22/92
5,173,541                       07/622,563                       12/22/92
5,173,546                       07/800,345                       12/22/92
5,173,548                       07/399,546                       12/22/92
5,173,552                       07/581,208                       12/22/92
5,173,555                       07/818,108                       12/22/92
5,173,560                       07/732,235                       12/22/92
5,173,564                       07/817,634                       12/22/92
5,173,572                       07/666,628                       12/22/92
5,173,573                       07/669,837                       12/22/92
5,173,581                       07/798,533                       12/22/92
5,173,585                       07/696,367                       12/22/92
5,173,586                       07/593,736                       12/22/92
5,173,588                       07/588,585                       12/22/92
5,173,595                       07/560,667                       12/22/92
5,173,606                       07/754,481                       12/22/92
5,173,615                       07/633,079                       12/22/92
5,173,619                       07/740,757                       12/22/92
5,173,622                       07/669,012                       12/22/92
5,173,640                       07/792,409                       12/22/92
5,173,649                       07/783,282                       12/22/92
5,173,650                       07/669,414                       12/22/92
5,173,654                       07/780,298                       12/22/92
5,173,660                       07/634,067                       12/22/92
5,173,675                       07/816,500                       12/22/92
5,173,684                       07/578,700                       12/22/92
5,173,685                       07/678,302                       12/22/92
5,173,687                       07/762,783                       12/22/92
5,173,690                       07/729,718                       12/22/92
5,173,692                       07/566,607                       12/22/92
5,173,699                       07/129,437                       12/22/92
5,173,708                       07/788,620                       12/22/92
5,173,712                       07/375,304                       12/22/92
5,173,723                       07/591,706                       12/22/92
5,173,726                       07/710,274                       12/22/92
5,173,737                       07/765,744                       12/22/92
5,173,738                       07/499,360                       12/22/92
5,173,740                       07/733,612                       12/22/92
5,173,756                       07/698,361                       12/22/92
5,173,767                       07/701,848                       12/22/92
5,173,768                       07/678,357                       12/22/92
5,173,776                       07/534,698                       12/22/92
5,173,777                       07/594,731                       12/22/92
5,173,781                       07/655,673                       12/22/92
5,173,800                       07/772,432                       12/22/92
5,173,813                       07/893,561                       12/22/92
5,173,817                       07/628,433                       12/22/92
5,173,821                       07/670,643                       12/22/92
5,173,831                       07/747,289                       12/22/92
5,173,832                       07/372,967                       12/22/92
5,173,833                       07/659,684                       12/22/92
5,173,839                       07/846,614                       12/22/92
5,173,840                       07/691,304                       12/22/92
5,173,842                       07/766,377                       12/22/92
5,173,844                       07/794,281                       12/22/92
5,173,850                       07/711,405                       12/22/92
5,173,857                       07/576,584                       12/22/92
5,173,863                       07/514,166                       12/22/92
5,173,869                       07/629,964                       12/22/92
5,173,876                       07/584,673                       12/22/92
5,173,877                       07/625,173                       12/22/92
5,173,878                       07/671,137                       12/22/92
5,173,880                       07/610,467                       12/22/92
5,173,883                       07/805,112                       12/22/92
5,173,884                       07/529,237                       12/22/92
5,173,893                       07/883,041                       12/22/92
5,173,903                       07/583,741                       12/22/92
5,173,911                       07/782,534                       12/22/92
5,173,917                       07/781,431                       12/22/92
5,173,933                       07/587,958                       12/22/92
5,173,935                       07/328,967                       12/22/92
5,173,936                       07/558,625                       12/22/92
5,173,942                       07/604,340                       12/22/92
5,173,951                       07/774,484                       12/22/92
5,173,954                       07/813,045                       12/22/92
5,173,957                       07/758,665                       12/22/92
5,173,961                       07/808,248                       12/22/92

                  PATENTS WHICH EXPIRED ON December 24, 2000
                     DUE TO FAILURE TO PAY MAINTENACE FEES

Patent                            Serial                            Issue
Number                            Number                             Date

5,586,340                       08/318,083                       12/24/96
5,586,343                       08/517,731                       12/24/96
5,586,349                       08/390,518                       12/24/96
5,586,354                       08/439,175                       12/24/96
5,586,368                       08/436,527                       12/24/96
5,586,369                       08/520,857                       12/24/96
5,586,370                       08/505,758                       12/24/96
5,586,372                       08/610,337                       12/24/96
5,586,374                       08/356,919                       12/24/96
5,586,375                       08/316,189                       12/24/96
5,586,376                       08/327,579                       12/24/96
5,586,377                       08/351,103                       12/24/96
5,586,378                       08/276,838                       12/24/96
5,586,380                       08/324,797                       12/24/96
5,586,390                       08/498,033                       12/24/96
5,586,392                       08/444,091                       12/24/96
5,586,394                       08/460,535                       12/24/96
5,586,395                       08/316,557                       12/24/96
5,586,399                       08/517,697                       12/24/96
5,586,403                       08/552,717                       12/24/96
5,586,405                       08/360,617                       12/24/96
5,586,406                       08/563,339                       12/24/96
5,586,409                       08/339,020                       12/24/96
5,586,413                       07/955,414                       12/24/96
5,586,414                       08/191,445                       12/24/96
5,586,415                       08/253,916                       12/24/96
5,586,420                       08/128,479                       12/24/96
5,586,422                       08/491,391                       12/24/96
5,586,426                       08/402,009                       12/24/96
5,586,434                       08/520,795                       12/24/96
5,586,445                       08/315,804                       12/24/96
5,586,450                       08/533,491                       12/24/96
5,586,463                       08/515,643                       12/24/96
5,586,464                       08/546,537                       12/24/96
5,586,471                       08/487,878                       12/24/96
5,586,475                       08/385,108                       12/24/96
5,586,482                       08/519,540                       12/24/96
5,586,484                       08/344,847                       12/24/96
5,586,488                       08/538,751                       12/24/96
5,586,503                       08/472,324                       12/24/96
5,586,509                       08/447,396                       12/24/96
5,586,512                       08/232,182                       12/24/96
5,586,515                       08/526,598                       12/24/96
5,586,519                       08/336,877                       12/24/96
5,586,521                       08/336,307                       12/24/96
5,586,523                       08/531,827                       12/24/96
5,586,529                       08/527,441                       12/24/96
5,586,540                       08/521,297                       12/24/96
5,586,541                       08/512,126                       12/24/96
5,586,558                       08/300,485                       12/24/96
5,586,559                       08/398,527                       12/24/96
5,586,566                       08/508,706                       12/24/96
5,586,572                       08/219,973                       12/24/96
5,586,575                       08/260,918                       12/24/96
5,586,577                       08/497,628                       12/24/96
5,586,579                       08/559,752                       12/24/96
5,586,580                       08/415,267                       12/24/96
5,586,588                       08/361,204                       12/24/96
5,586,593                       08/497,558                       12/24/96
5,586,602                       08/555,421                       12/24/96
5,586,604                       08/584,980                       12/24/96
5,586,621                       08/544,259                       12/24/96
5,586,624                       08/522,927                       12/24/96
5,586,628                       08/463,769                       12/24/96
5,586,631                       08/363,513                       12/24/96
5,586,638                       08/390,080                       12/24/96
5,586,646                       08/468,631                       12/24/96
5,586,653                       08/124,026                       12/24/96
5,586,661                       08/357,911                       12/24/96
5,586,665                       08/396,712                       12/24/96
5,586,670                       08/554,582                       12/24/96
5,586,674                       08/571,473                       12/24/96
5,586,676                       08/546,337                       12/24/96
5,586,677                       08/316,240                       12/24/96
5,586,678                       08/334,529                       12/24/96
5,586,679                       08/106,648                       12/24/96
5,586,683                       08/256,423                       12/24/96
5,586,689                       08/418,427                       12/24/96
5,586,692                       08/402,642                       12/24/96
5,586,695                       08/398,971                       12/24/96
5,586,696                       08/375,372                       12/24/96
5,586,701                       08/536,208                       12/24/96
5,586,703                       08/451,858                       12/24/96
5,586,704                       08/399,893                       12/24/96
5,586,717                       08/385,954                       12/24/96
5,586,719                       08/345,120                       12/24/96
5,586,722                       08/435,188                       12/24/96
5,586,726                       08/508,867                       12/24/96
5,586,748                       08/413,097                       12/24/96
5,586,749                       08/261,719                       12/24/96
5,586,750                       08/378,373                       12/24/96
5,586,760                       08/510,357                       12/24/96
5,586,763                       08/529,720                       12/24/96
5,586,765                       08/342,148                       12/24/96
5,586,775                       08/502,577                       12/24/96
5,586,777                       08/462,829                       12/24/96
5,586,778                       08/514,136                       12/24/96
5,586,785                       08/540,362                       12/24/96
5,586,787                       08/360,984                       12/24/96
5,586,794                       08/361,429                       12/24/96
5,586,799                       08/524,958                       12/24/96
5,586,800                       08/535,776                       12/24/96
5,586,801                       08/329,929                       12/24/96
5,586,803                       08/324,402                       12/24/96
5,586,805                       08/280,497                       12/24/96
5,586,806                       08/561,437                       12/24/96
5,586,808                       08/426,040                       12/24/96
5,586,810                       08/599,847                       12/24/96
5,586,822                       08/498,198                       12/24/96
5,586,830                       08/349,533                       12/24/96
5,586,832                       08/446,479                       12/24/96
5,586,835                       08/393,179                       12/24/96
5,586,836                       08/241,127                       12/24/96
5,586,838                       08/453,399                       12/24/96
5,586,840                       08/501,101                       12/24/96
5,586,842                       08/237,209                       12/24/96
5,586,851                       08/445,998                       12/24/96
5,586,869                       08/244,917                       12/24/96
5,586,872                       08/232,096                       12/24/96
5,586,884                       08/296,736                       12/24/96
5,586,889                       08/310,889                       12/24/96
5,586,896                       08/371,243                       12/24/96
5,586,902                       08/247,998                       12/24/96
5,586,924                       08/591,811                       12/24/96
5,586,925                       08/225,379                       12/24/96
5,586,931                       08/519,660                       12/24/96
5,586,933                       08/333,557                       12/24/96
5,586,934                       08/515,141                       12/24/96
5,586,935                       08/478,879                       12/24/96
5,586,939                       08/249,301                       12/24/96
5,586,945                       08/589,299                       12/24/96
5,586,946                       08/537,129                       12/24/96
5,586,949                       08/510,099                       12/24/96
5,586,955                       08/514,279                       12/24/96
5,586,959                       08/575,548                       12/24/96
5,586,967                       08/267,149                       12/24/96
5,586,973                       08/353,879                       12/24/96
5,586,976                       08/540,962                       12/24/96
5,586,978                       08/335,106                       12/24/96
5,586,991                       08/178,151                       12/24/96
5,587,000                       08/353,843                       12/24/96
5,587,003                       08/407,817                       12/24/96
5,587,012                       08/493,411                       12/24/96
5,587,018                       08/375,676                       12/24/96
5,587,031                       08/504,476                       12/24/96
5,587,037                       08/344,566                       12/24/96
5,587,041                       08/457,608                       12/24/96
5,587,046                       08/419,362                       12/24/96
5,587,057                       08/163,683                       12/24/96
5,587,063                       08/464,702                       12/24/96
5,587,065                       08/035,626                       12/24/96
5,587,067                       08/493,074                       12/24/96
5,587,074                       08/390,134                       12/24/96
5,587,082                       08/480,238                       12/24/96
5,587,084                       08/384,967                       12/24/96
5,587,086                       08/458,698                       12/24/96
5,587,096                       08/361,060                       12/24/96
5,587,099                       08/332,137                       12/24/96
5,587,105                       08/493,434                       12/24/96
5,587,106                       08/467,898                       12/24/96
5,587,108                       08/319,278                       12/24/96
5,587,127                       08/293,948                       12/24/96
5,587,131                       08/405,848                       12/24/96
5,587,138                       08/422,549                       12/24/96
5,587,141                       08/387,253                       12/24/96
5,587,187                       08/384,267                       12/24/96
5,587,191                       08/507,584                       12/24/96
5,587,204                       08/408,479                       12/24/96
5,587,215                       08/305,582                       12/24/96
5,587,223                       08/270,201                       12/24/96
5,587,231                       08/282,371                       12/24/96
5,587,234                       08/437,592                       12/24/96
5,587,239                       08/265,963                       12/24/96
5,587,246                       08/450,149                       12/24/96
5,587,251                       08/168,251                       12/24/96
5,587,252                       08/483,160                       12/24/96
5,587,268                       08/400,343                       12/24/96
5,587,270                       08/400,349                       12/24/96
5,587,274                       08/350,733                       12/24/96
5,587,283                       08/303,505                       12/24/96
5,587,295                       08/276,914                       12/24/96
5,587,303                       08/277,775                       12/24/96
5,587,310                       08/273,362                       12/24/96
5,587,317                       08/562,944                       12/24/96
5,587,321                       08/509,174                       12/24/96
5,587,322                       08/344,217                       12/24/96
5,587,346                       08/491,064                       12/24/96
5,587,347                       08/411,153                       12/24/96
5,587,351                       08/294,190                       12/24/96
5,587,372                       08/167,192                       12/24/96
5,587,377                       08/547,209                       12/24/96
5,587,379                       08/446,354                       12/24/96
5,587,385                       08/452,288                       12/24/96
5,587,387                       08/432,748                       12/24/96
5,587,392                       08/453,054                       12/24/96
5,587,395                       08/428,532                       12/24/96
5,587,420                       08/070,793                       12/24/96
5,587,422                       08/471,838                       12/24/96
5,587,424                       08/456,348                       12/24/96
5,587,452                       08/498,278                       12/24/96
5,587,461                       08/316,268                       12/24/96
5,587,465                       07/460,702                       12/24/96
5,587,466                       08/539,437                       12/24/96
5,587,487                       08/448,510                       12/24/96
5,587,495                       07/678,352                       12/24/96
5,587,499                       08/439,141                       12/24/96
5,587,504                       08/545,484                       12/24/96
5,587,509                       08/400,750                       12/24/96
5,587,510                       08/448,310                       12/24/96
5,587,516                       08/463,739                       12/24/96
5,587,527                       08/468,230                       12/24/96
5,587,532                       08/371,719                       12/24/96
5,587,537                       08/393,694                       12/24/96
5,587,562                       08/503,632                       12/24/96
5,587,571                       08/375,983                       12/24/96
5,587,572                       08/380,833                       12/24/96
5,587,574                       08/648,292                       12/24/96
5,587,595                       08/387,778                       12/24/96
5,587,597                       07/728,917                       12/24/96
5,587,608                       08/549,231                       12/24/96
5,587,616                       08/057,718                       12/24/96
5,587,634                       08/346,482                       12/24/96
5,587,638                       08/392,790                       12/24/96
5,587,654                       08/046,071                       12/24/96
5,587,660                       08/411,697                       12/24/96
5,587,663                       08/407,078                       12/24/96
5,587,674                       08/418,558                       12/24/96
5,587,695                       08/287,004                       12/24/96
5,587,700                       08/297,374                       12/24/96
5,587,703                       08/419,434                       12/24/96
5,587,704                       08/523,078                       12/24/96
5,587,721                       08/364,167                       12/24/96
5,587,725                       08/304,972                       12/24/96
5,587,740                       08/516,273                       12/24/96
5,587,743                       08/224,734                       12/24/96
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5,587,795                       08/502,255                       12/24/96
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5,587,827                       08/381,741                       12/24/96
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5,587,884                       08/384,086                       12/24/96
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5,587,925                       08/336,188                       12/24/96
5,587,940                       08/152,423                       12/24/96
5,587,944                       08/617,247                       12/24/96
5,587,970                       08/346,418                       12/24/96
5,587,972                       08/610,502                       12/24/96
5,587,981                       08/523,461                       12/24/96
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5,588,044                       08/343,721                       12/24/96
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5,588,057                       08/492,472                       12/24/96
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5,588,067                       08/019,847                       12/24/96
5,588,073                       08/550,227                       12/24/96
5,588,083                       08/312,254                       12/24/96