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 29, 1999
                    DUE TO FAILURE TO PAY MAINTENANCE FEES

Patent                      Application                     Issue
Number                         Number                        Date

4,715,076                   06/788,412                   12/29/87
4,715,078                   06/708,946                   12/29/87
4,715,091                   07/029,448                   12/29/87
4,715,094                   06/869,990                   12/29/87
4,715,095                   06/946,977                   12/29/87
4,715,098                   06/897,470                   12/29/87
4,715,102                   06/925,999                   12/29/87
4,715,108                   06/836,417                   12/29/87
4,715,109                   06/744,163                   12/29/87
4,715,110                   06/888,238                   12/29/87
4,715,113                   06/881,234                   12/29/87
4,715,115                   06/847,410                   12/29/87
4,715,123                   06/885,141                   12/29/87
4,715,127                   06/820,096                   12/29/87
4,715,129                   06/824,573                   12/29/87
4,715,143                   06/794,626                   12/29/87
4,715,146                   06/894,449                   12/29/87
4,715,158                   06/872,331                   12/29/87
4,715,159                   06/916,380                   12/29/87
4,715,166                   07/001,194                   12/29/87
4,715,172                   06/886,176                   12/29/87
4,715,201                   06/870,940                   12/29/87
4,715,207                   06/875,957                   12/29/87
4,715,211                   06/874,533                   12/29/87
4,715,219                   06/891,218                   12/29/87
4,715,221                   06/893,149                   12/29/87
4,715,222                   06/938,886                   12/29/87
4,715,225                   06/759,077                   12/29/87
4,715,226                   06/896,972                   12/29/87
4,715,228                   06/900,694                   12/29/87
4,715,237                   06/848,404                   12/29/87
4,715,240                   06/770,859                   12/29/87
4,715,242                   06/829,165                   12/29/87
4,715,259                   07/034,446                   12/29/87
4,715,260                   06/945,152                   12/29/87
4,715,268                   06/817,802                   12/29/87
4,715,272                   06/834,399                   12/29/87
4,715,276                   06/915,852                   12/29/87
4,715,278                   06/879,604                   12/29/87
4,715,286                   06/802,389                   12/29/87
4,715,288                   06/857,181                   12/29/87
4,715,289                   06/868,025                   12/29/87
4,715,306                   06/848,305                   12/29/87
4,715,311                   07/033,850                   12/29/87
4,715,317                   06/787,079                   12/29/87
4,715,335                   06/710,864                   12/29/87
4,715,341                   06/309,148                   12/29/87
4,715,342                   06/813,434                   12/29/87
4,715,351                   06/900,088                   12/29/87
4,715,354                   06/862,224                   12/29/87
4,715,356                   07/004,669                   12/29/87
4,715,363                   06/912,906                   12/29/87
4,715,388                   06/746,650                   12/29/87
4,715,395                   06/880,601                   12/29/87
4,715,399                   06/665,657                   12/29/87
4,715,415                   06/944,180                   12/29/87
4,715,418                   06/744,896                   12/29/87
4,715,420                   06/873,092                   12/29/87
4,715,428                   06/876,309                   12/29/87
4,715,429                   06/874,962                   12/29/87
4,715,430                   06/923,456                   12/29/87
4,715,438                   06/880,427                   12/29/87
4,715,440                   06/885,241                   12/29/87
4,715,465                   06/820,433                   12/29/87
4,715,467                   06/713,935                   12/29/87
4,715,468                   06/945,522                   12/29/87
4,715,470                   06/841,073                   12/29/87
4,715,475                   06/884,901                   12/29/87
4,715,476                   06/913,174                   12/29/87
4,715,477                   06/887,246                   12/29/87
4,715,487                   06/928,589                   12/29/87
4,715,490                   06/853,917                   12/29/87
4,715,500                   06/881,003                   12/29/87
4,715,507                   07/046,108                   12/29/87
4,715,510                   06/834,771                   12/29/87
4,715,511                   06/909,143                   12/29/87
4,715,514                   06/851,141                   12/29/87
4,715,515                   06/884,148                   12/29/87
4,715,519                   06/856,833                   12/29/87
4,715,526                   06/932,848                   12/29/87
4,715,533                   06/846,790                   12/29/87
4,715,535                   06/856,758                   12/29/87
4,715,544                   06/924,619                   12/29/87
4,715,545                   06/828,788                   12/29/87
4,715,546                   07/017,295                   12/29/87
4,715,550                   07/026,472                   12/29/87
4,715,554                   06/850,177                   12/29/87
4,715,555                   06/933,981                   12/29/87
4,715,568                   06/893,214                   12/29/87
4,715,572                   07/031,659                   12/29/87
4,715,579                   07/014,667                   12/29/87
4,715,594                   06/827,352                   12/29/87
4,715,597                   06/841,182                   12/29/87
4,715,607                   06/830,695                   12/29/87
4,715,609                   06/804,256                   12/29/87
4,715,614                   06/631,791                   12/29/87
4,715,615                   06/632,648                   12/29/87
4,715,619                   06/818,553                   12/29/87
4,715,621                   06/872,547                   12/29/87
4,715,647                   06/916,912                   12/29/87
4,715,655                   06/801,961                   12/29/87
4,715,658                   07/020,131                   12/29/87
4,715,660                   07/006,335                   12/29/87
4,715,667                   06/873,272                   12/29/87
4,715,671                   06/743,008                   12/29/87
4,715,687                   06/945,630                   12/29/87
4,715,701                   06/888,413                   12/29/87
4,715,702                   06/920,762                   12/29/87
4,715,706                   06/920,660                   12/29/87
4,715,707                   06/847,723                   12/29/87
4,715,709                   06/727,874                   12/29/87
4,715,718                   06/748,363                   12/29/87
4,715,734                   06/915,997                   12/29/87
4,715,740                   06/924,978                   12/29/87
4,715,742                   06/840,389                   12/29/87
4,715,744                   06/941,045                   12/29/87
4,715,745                   06/858,185                   12/29/87
4,715,755                   06/852,457                   12/29/87
4,715,759                   06/682,752                   12/29/87
4,715,772                   06/853,912                   12/29/87
4,715,776                   06/801,069                   12/29/87
4,715,788                   06/450,299                   12/29/87
4,715,792                   06/848,230                   12/29/87
4,715,796                   06/842,235                   12/29/87
4,715,799                   06/856,688                   12/29/87
4,715,805                   07/028,750                   12/29/87
4,715,808                   06/866,765                   12/29/87
4,715,809                   06/811,920                   12/29/87
4,715,811                   06/882,125                   12/29/87
4,715,819                   06/898,780                   12/29/87
4,715,837                   06/891,418                   12/29/87
4,715,845                   06/888,451                   12/29/87
4,715,850                   06/679,128                   12/29/87
4,715,860                   06/768,871                   12/29/87
4,715,867                   06/848,309                   12/29/87
4,715,870                   06/915,929                   12/29/87
4,715,876                   06/878,777                   12/29/87
4,715,896                   06/892,445                   12/29/87
4,715,897                   06/862,695                   12/29/87
4,715,905                   06/833,394                   12/29/87
4,715,908                   06/864,333                   12/29/87
4,715,913                   06/858,556                   12/29/87
4,715,916                   06/778,259                   12/29/87
4,715,928                   06/909,315                   12/29/87
4,715,933                   06/776,450                   12/29/87
4,715,990                   06/821,572                   12/29/87
4,715,991                   06/848,051                   12/29/87
4,715,994                   06/927,028                   12/29/87
4,716,006                   06/855,239                   12/29/87
4,716,007                   06/559,848                   12/29/87
4,716,008                   06/696,369                   12/29/87
4,716,040                   06/685,324                   12/29/87
4,716,042                   06/874,956                   12/29/87
4,716,043                   06/718,021                   12/29/87
4,716,056                   06/945,887                   12/29/87
4,716,061                   06/810,110                   12/29/87
4,716,070                   06/845,281                   12/29/87
4,716,076                   06/743,679                   12/29/87
4,716,111                   06/696,546                   12/29/87
4,716,112                   06/829,456                   12/29/87
4,716,127                   06/852,317                   12/29/87
4,716,136                   06/811,199                   12/29/87
4,716,147                   06/844,906                   12/29/87
4,716,161                   06/719,456                   12/29/87
4,716,167                   06/823,479                   12/29/87
4,716,178                   06/879,472                   12/29/87
4,716,182                   06/891,725                   12/29/87
4,716,183                   06/801,018                   12/29/87
4,716,187                   06/712,345                   12/29/87
4,716,199                   06/847,388                   12/29/87
4,716,201                   06/846,656                   12/29/87
4,716,205                   06/787,149                   12/29/87
4,716,207                   06/903,637                   12/29/87
4,716,209                   06/824,547                   12/29/87
4,716,218                   06/819,413                   12/29/87
4,716,221                   06/842,286                   12/29/87
4,716,222                   06/720,347                   12/29/87
4,716,223                   06/837,201                   12/29/87
4,716,226                   06/791,774                   12/29/87
4,716,231                   07/043,056                   12/29/87
4,716,236                   06/805,254                   12/29/87
4,716,240                   07/011,964                   12/29/87
4,716,257                   07/029,186                   12/29/87
4,716,267                   06/751,334                   12/29/87
4,716,286                   06/844,891                   12/29/87
4,716,291                   06/733,806                   12/29/87
4,716,296                   06/371,610                   12/29/87
4,716,300                   06/881,763                   12/29/87
4,716,301                   06/849,276                   12/29/87
4,716,302                   06/945,253                   12/29/87
4,716,312                   07/047,492                   12/29/87
4,716,320                   06/876,624                   12/29/87
4,716,326                   06/864,048                   12/29/87
4,716,331                   07/025,430                   12/29/87
4,716,337                   07/000,720                   12/29/87
4,716,349                   06/645,959                   12/29/87
4,716,359                   06/930,794                   12/29/87
4,716,370                   06/778,368                   12/29/87
4,716,371                   06/757,652                   12/29/87
4,716,372                   06/908,812                   12/29/87
4,716,374                   06/874,244                   12/29/87
4,716,389                   06/920,964                   12/29/87
4,716,406                   06/725,816                   12/29/87
4,716,411                   06/859,498                   12/29/87
4,716,413                   06/826,440                   12/29/87
4,716,420                   06/923,353                   12/29/87
4,716,426                   07/010,276                   12/29/87
4,716,429                   06/945,370                   12/29/87
4,716,439                   06/854,214                   12/29/87
4,716,446                   06/872,630                   12/29/87
4,716,447                   06/904,805                   12/29/87
4,716,455                   06/840,654                   12/29/87
4,716,459                   06/912,582                   12/29/87
4,716,466                   06/738,331                   12/29/87
4,716,467                   06/706,201                   12/29/87
4,716,476                   06/817,544                   12/29/87
4,716,479                   07/028,059                   12/29/87
4,716,484                   06/619,917                   12/29/87
4,716,491                   06/806,341                   12/29/87
4,716,496                   06/861,168                   12/29/87
4,716,500                   06/789,278                   12/29/87
4,716,501                   06/921,295                   12/29/87
4,716,503                   06/652,202                   12/29/87
4,716,504                   07/025,496                   12/29/87
4,716,506                   06/907,242                   12/29/87
4,716,512                   06/903,425                   12/29/87
4,716,513                   06/890,047                   12/29/87
4,716,524                   06/719,778                   12/29/87
4,716,528                   06/825,508                   12/29/87
4,716,530                   06/704,522                   12/29/87
4,716,532                   06/838,146                   12/29/87
4,716,534                   06/666,806                   12/29/87
4,716,535                   06/727,799                   12/29/87
4,716,537                   06/592,799                   12/29/87
4,716,538                   06/687,892                   12/29/87
4,716,539                   06/687,875                   12/29/87
4,716,540                   06/751,447                   12/29/87
4,716,541                   06/637,772                   12/29/87
4,716,546                   06/890,662                   12/29/87
4,716,550                   06/882,569                   12/29/87
4,716,559                   06/900,792                   12/29/87
4,716,566                   06/767,596                   12/29/87
4,716,567                   06/827,606                   12/29/87
4,716,585                   06/720,507                   12/29/87

                  PATENTS WHICH EXPIRED ON December 24, 1999
                    DUE TO FAILURE TO PAY MAINTENANCE FEES

Patent                      Application                     Issue
Number                         Number                        Date

5,073,984                   07/587,350                   12/24/91
5,073,989                   07/416,411                   12/24/91
5,073,995                   07/594,723                   12/24/91
5,074,005                   07/524,902                   12/24/91
5,074,007                   07/466,228                   12/24/91
5,074,009                   07/461,632                   12/24/91
5,074,010                   07/409,391                   12/24/91
5,074,012                   07/701,788                   12/24/91
5,074,013                   07/587,756                   12/24/91
5,074,017                   07/454,782                   12/24/91
5,074,019                   07/447,784                   12/24/91
5,074,023                   07/552,576                   12/24/91
5,074,024                   07/223,828                   12/24/91
5,074,028                   07/575,320                   12/24/91
5,074,039                   07/604,555                   12/24/91
5,074,050                   07/138,987                   12/24/91
5,074,055                   07/506,060                   12/24/91
5,074,056                   07/574,751                   12/24/91
5,074,058                   07/415,364                   12/24/91
5,074,069                   07/674,586                   12/24/91
5,074,074                   07/606,765                   12/24/91
5,074,079                   07/550,718                   12/24/91
5,074,082                   07/456,302                   12/24/91
5,074,086                   07/493,153                   12/24/91
5,074,092                   07/387,924                   12/24/91
5,074,095                   07/452,578                   12/24/91
5,074,096                   07/531,358                   12/24/91
5,074,098                   07/563,083                   12/24/91
5,074,100                   07/652,932                   12/24/91
5,074,101                   07/496,631                   12/24/91
5,074,107                   07/605,580                   12/24/91
5,074,110                   07/600,672                   12/24/91
5,074,115                   07/589,682                   12/24/91
5,074,116                   07/460,078                   12/24/91
5,074,124                   07/572,031                   12/24/91
5,074,125                   07/582,363                   12/24/91
5,074,132                   07/567,567                   12/24/91
5,074,135                   07/234,855                   12/24/91
5,074,141                   07/428,060                   12/24/91
5,074,145                   07/623,137                   12/24/91
5,074,149                   07/675,400                   12/24/91
5,074,150                   07/380,100                   12/24/91
5,074,151                   07/555,347                   12/24/91
5,074,165                   07/658,907                   12/24/91
5,074,174                   07/550,369                   12/24/91
5,074,176                   07/640,256                   12/24/91
5,074,192                   07/348,304                   12/24/91
5,074,193                   07/368,776                   12/24/91
5,074,200                   07/360,798                   12/24/91
5,074,203                   07/595,382                   12/24/91
5,074,205                   07/579,333                   12/24/91
5,074,206                   07/667,757                   12/24/91
5,074,211                   07/496,532                   12/24/91
5,074,214                   07/652,841                   12/24/91
5,074,215                   07/551,108                   12/24/91
5,074,224                   07/593,806                   12/24/91
5,074,226                   07/656,957                   12/24/91
5,074,227                   07/548,860                   12/24/91
5,074,231                   07/639,554                   12/24/91
5,074,233                   07/621,760                   12/24/91
5,074,237                   07/598,773                   12/24/91
5,074,246                   07/490,138                   12/24/91
5,074,252                   07/553,171                   12/24/91
5,074,256                   07/469,472                   12/24/91
5,074,263                   07/474,543                   12/24/91
5,074,264                   07/652,456                   12/24/91
5,074,272                   07/449,460                   12/24/91
5,074,277                   07/702,754                   12/24/91
5,074,280                   07/668,600                   12/24/91
5,074,283                   07/565,525                   12/24/91
5,074,290                   07/547,685                   12/24/91
5,074,294                   07/369,298                   12/24/91
5,074,295                   07/388,931                   12/24/91
5,074,299                   07/402,680                   12/24/91
5,074,307                   07/488,713                   12/24/91
5,074,309                   07/444,920                   12/24/91
5,074,314                   07/511,988                   12/24/91
5,074,319                   07/511,158                   12/24/91
5,074,321                   07/414,833                   12/24/91
5,074,324                   07/729,743                   12/24/91
5,074,325                   07/481,035                   12/24/91
5,074,326                   07/616,214                   12/24/91
5,074,328                   07/667,104                   12/24/91
5,074,331                   07/691,667                   12/24/91
5,074,333                   07/586,336                   12/24/91
5,074,340                   07/527,046                   12/24/91
5,074,341                   07/596,168                   12/24/91
5,074,346                   07/460,101                   12/24/91
5,074,352                   07/538,673                   12/24/91
5,074,373                   07/503,612                   12/24/91
5,074,374                   07/561,634                   12/24/91
5,074,375                   07/565,657                   12/24/91
5,074,378                   07/636,896                   12/24/91
5,074,382                   07/444,124                   12/24/91
5,074,384                   07/494,055                   12/24/91
5,074,387                   07/495,949                   12/24/91
5,074,391                   07/432,534                   12/24/91
5,074,395                   07/472,868                   12/24/91
5,074,400                   07/528,504                   12/24/91
5,074,402                   07/633,555                   12/24/91
5,074,407                   07/499,962                   12/24/91
5,074,420                   07/505,908                   12/24/91
5,074,421                   07/557,259                   12/24/91
5,074,422                   07/585,976                   12/24/91
5,074,423                   07/685,994                   12/24/91
5,074,430                   07/478,418                   12/24/91
5,074,432                   07/557,181                   12/24/91
5,074,439                   07/612,554                   12/24/91
5,074,441                   07/411,868                   12/24/91
5,074,445                   07/574,037                   12/24/91
5,074,448                   07/661,145                   12/24/91
5,074,451                   07/453,720                   12/24/91
5,074,460                   07/602,623                   12/24/91
5,074,462                   07/713,220                   12/24/91
5,074,466                   07/464,950                   12/24/91
5,074,474                   07/231,736                   12/24/91
5,074,476                   07/475,601                   12/24/91
5,074,486                   07/542,221                   12/24/91
5,074,489                   07/415,734                   12/24/91
5,074,493                   07/632,442                   12/24/91
5,074,494                   07/598,470                   12/24/91
5,074,498                   07/694,423                   12/24/91
5,074,499                   07/437,568                   12/24/91
5,074,502                   07/511,246                   12/24/91
5,074,504                   07/622,951                   12/24/91
5,074,505                   07/531,472                   12/24/91
5,074,512                   07/445,422                   12/24/91
5,074,513                   07/597,079                   12/24/91
5,074,514                   07/441,987                   12/24/91
5,074,519                   07/612,889                   12/24/91
5,074,521                   07/505,135                   12/24/91
5,074,525                   07/612,191                   12/24/91
5,074,529                   07/579,388                   12/24/91
5,074,531                   07/465,248                   12/24/91
5,074,536                   07/638,451                   12/24/91
5,074,550                   07/548,697                   12/24/91
5,074,555                   07/341,804                   12/24/91
5,074,560                   07/584,552                   12/24/91
5,074,561                   07/570,273                   12/24/91
5,074,563                   07/626,630                   12/24/91
5,074,565                   07/665,805                   12/24/91
5,074,606                   07/598,983                   12/24/91
5,074,612                   07/615,294                   12/24/91
5,074,614                   07/658,112                   12/24/91
5,074,615                   07/607,169                   12/24/91
5,074,617                   07/189,523                   12/24/91
5,074,621                   07/443,525                   12/24/91
5,074,626                   07/510,302                   12/24/91
5,074,627                   07/552,384                   12/24/91
5,074,648                   07/462,978                   12/24/91
5,074,654                   07/570,750                   12/24/91
5,074,661                   07/212,011                   12/24/91
5,074,665                   07/454,702                   12/24/91
5,074,666                   07/475,391                   12/24/91
5,074,671                   07/612,226                   12/24/91
5,074,685                   07/675,037                   12/24/91
5,074,694                   07/607,159                   12/24/91
5,074,698                   07/642,874                   12/24/91
5,074,701                   07/661,506                   12/24/91
5,074,707                   07/199,947                   12/24/91
5,074,709                   07/471,871                   12/24/91
5,074,713                   07/607,424                   12/24/91
5,074,714                   07/567,008                   12/24/91
5,074,716                   07/573,955                   12/24/91
5,074,717                   07/543,736                   12/24/91
5,074,719                   07/619,215                   12/24/91
5,074,724                   07/661,619                   12/24/91
5,074,732                   07/511,908                   12/24/91
5,074,735                   07/579,882                   12/24/91
5,074,736                   07/631,180                   12/24/91
5,074,737                   07/569,262                   12/24/91
5,074,746                   07/602,857                   12/24/91
5,074,750                   07/461,929                   12/24/91
5,074,755                   07/436,308                   12/24/91
5,074,758                   07/276,344                   12/24/91
5,074,759                   07/493,295                   12/24/91
5,074,770                   07/400,722                   12/24/91
5,074,773                   07/507,858                   12/24/91
5,074,774                   07/557,843                   12/24/91
5,074,775                   07/582,062                   12/24/91
5,074,778                   07/611,035                   12/24/91
5,074,790                   07/436,594                   12/24/91
5,074,791                   07/552,866                   12/24/91
5,074,792                   07/487,713                   12/24/91
5,074,794                   07/603,423                   12/24/91
5,074,807                   07/621,407                   12/24/91
5,074,813                   07/573,730                   12/24/91
5,074,824                   07/529,471                   12/24/91
5,074,829                   07/600,182                   12/24/91
5,074,830                   07/671,782                   12/24/91
5,074,832                   07/531,585                   12/24/91
5,074,834                   07/596,612                   12/24/91
5,074,835                   07/518,157                   12/24/91
5,074,836                   07/562,116                   12/24/91
5,074,837                   07/478,560                   12/24/91
5,074,838                   07/535,058                   12/24/91
5,074,842                   07/555,033                   12/24/91
5,074,848                   07/556,621                   12/24/91
5,074,858                   07/470,973                   12/24/91
5,074,861                   07/539,383                   12/24/91
5,074,862                   07/362,969                   12/24/91
5,074,866                   07/598,046                   12/24/91
5,074,869                   07/540,863                   12/24/91
5,074,873                   07/423,775                   12/24/91
5,074,874                   07/587,113                   12/24/91
5,074,875                   07/432,852                   12/24/91
5,074,877                   07/583,151                   12/24/91
5,074,885                   07/576,639                   12/24/91
5,074,891                   07/386,528                   12/24/91
5,074,894                   07/649,465                   12/24/91
5,074,901                   07/334,677                   12/24/91
5,074,906                   07/566,419                   12/24/91
5,074,911                   07/544,282                   12/24/91
5,074,913                   07/632,572                   12/24/91
5,074,915                   07/463,513                   12/24/91
5,074,916                   07/525,539                   12/24/91
5,074,923                   07/498,794                   12/24/91
5,074,928                   07/617,329                   12/24/91
5,074,929                   07/399,789                   12/24/91
5,074,933                   07/384,363                   12/24/91
5,074,938                   07/528,938                   12/24/91
5,074,940                   07/716,898                   12/24/91
5,074,941                   07/624,989                   12/24/91
5,074,948                   07/477,901                   12/24/91
5,074,949                   07/570,658                   12/24/91
5,074,952                   07/372,098                   12/24/91
5,074,953                   07/395,724                   12/24/91
5,074,955                   07/568,871                   12/24/91
5,074,956                   07/571,536                   12/24/91
5,074,959                   07/476,557                   12/24/91
5,074,960                   07/606,595                   12/24/91
5,074,962                   07/623,194                   12/24/91
5,074,969                   07/666,007                   12/24/91
5,074,971                   07/483,895                   12/24/91
5,074,974                   07/535,335                   12/24/91
5,074,975                   07/564,730                   12/24/91
5,074,978                   07/483,837                   12/24/91
5,074,979                   07/540,991                   12/24/91
5,074,987                   07/469,869                   12/24/91
5,074,989                   07/639,756                   12/24/91
5,074,990                   07/543,503                   12/24/91
5,075,003                   07/521,141                   12/24/91
5,075,006                   07/620,800                   12/24/91
5,075,016                   07/259,525                   12/24/91
5,075,020                   07/667,045                   12/24/91
5,075,024                   07/274,986                   12/24/91
5,075,026                   06/866,029                   12/24/91
5,075,027                   07/536,150                   12/24/91
5,075,028                   07/435,770                   12/24/91
5,075,034                   07/404,709                   12/24/91
5,075,039                   07/531,354                   12/24/91
5,075,043                   07/402,725                   12/24/91
5,075,045                   07/614,285                   12/24/91
5,075,047                   07/542,927                   12/24/91
5,075,048                   07/558,348                   12/24/91
5,075,056                   07/448,098                   12/24/91
5,075,073                   07/649,523                   12/24/91
5,075,074                   07/529,820                   12/24/91
5,075,076                   07/464,551                   12/24/91
5,075,083                   07/416,250                   12/24/91
5,075,085                   07/521,271                   12/24/91
5,075,100                   07/242,731                   12/24/91
5,075,106                   07/622,890                   12/24/91
5,075,111                   07/343,504                   12/24/91
5,075,117                   07/602,381                   12/24/91
5,075,119                   07/551,643                   12/24/91
5,075,120                   07/708,000                   12/24/91
5,075,123                   07/658,991                   12/24/91
5,075,130                   07/618,195                   12/24/91
5,075,138                   07/599,697                   12/24/91
5,075,144                   07/499,842                   12/24/91
5,075,149                   07/475,923                   12/24/91
5,075,150                   07/607,602                   12/24/91
5,075,161                   07/326,960                   12/24/91
5,075,166                   07/487,741                   12/24/91
5,075,179                   07/448,893                   12/24/91
5,075,190                   07/560,644                   12/24/91
5,075,192                   07/453,565                   12/24/91
5,075,193                   07/662,395                   12/24/91
5,075,195                   07/565,768                   12/24/91
5,075,196                   07/581,123                   12/24/91
5,075,202                   07/581,210                   12/24/91
5,075,209                   07/567,931                   12/24/91
5,075,210                   07/455,580                   12/24/91
5,075,226                   07/581,601                   12/24/91
5,075,229                   07/205,776                   12/24/91
5,075,243                   07/677,373                   12/24/91
5,075,249                   07/331,193                   12/24/91
5,075,251                   07/404,529                   12/24/91
5,075,260                   07/500,997                   12/24/91
5,075,266                   07/381,501                   12/24/91
5,075,270                   06/872,113                   12/24/91
5,075,271                   07/609,495                   12/24/91
5,075,274                   07/493,974                   12/24/91
5,075,281                   07/292,827                   12/24/91
5,075,283                   07/321,262                   12/24/91
5,075,285                   07/363,897                   12/24/91
5,075,286                   07/339,338                   12/24/91
5,075,287                   07/485,263                   12/24/91
5,075,289                   07/203,400                   12/24/91
5,075,302                   07/491,148                   12/24/91
5,075,304                   07/353,793                   12/24/91
5,075,305                   07/672,066                   12/24/91
5,075,306                   07/570,019                   12/24/91
5,075,310                   07/370,494                   12/24/91
5,075,311                   07/460,212                   12/24/91
5,075,312                   07/411,966                   12/24/91
5,075,314                   07/500,176                   12/24/91
5,075,317                   07/369,324                   12/24/91
5,075,320                   07/429,977                   12/24/91
5,075,322                   07/613,149                   12/24/91
5,075,325                   07/540,229                   12/24/91
5,075,326                   07/513,745                   12/24/91
5,075,327                   07/270,991                   12/24/91
5,075,335                   07/495,444                   12/24/91
5,075,337                   07/385,632                   12/24/91
5,075,338                   07/420,058                   12/24/91
5,075,339                   07/531,653                   12/24/91
5,075,343                   07/437,105                   12/24/91
5,075,344                   07/703,076                   12/24/91
5,075,347                   07/300,506                   12/24/91
5,075,351                   07/582,480                   12/24/91
5,075,355                   07/407,167                   12/24/91
5,075,359                   07/422,346                   12/24/91
5,075,364                   07/481,544                   12/24/91
5,075,367                   07/625,370                   12/24/91
5,075,373                   07/302,966                   12/24/91
5,075,376                   07/461,396                   12/24/91
5,075,380                   07/566,859                   12/24/91
5,075,385                   07/626,096                   12/24/91
5,075,389                   07/655,290                   12/24/91
5,075,394                   07/534,658                   12/24/91
5,075,399                   07/613,171                   12/24/91
5,075,409                   07/520,202                   12/24/91
5,075,415                   07/436,954                   12/24/91
5,075,416                   07/647,607                   12/24/91
5,075,426                   07/546,527                   12/24/91
5,075,428                   07/377,994                   12/24/91
5,075,429                   07/419,327                   12/24/91
5,075,438                   07/523,771                   12/24/91
5,075,455                   07/401,643                   12/24/91
5,075,460                   07/447,002                   12/24/91
5,075,465                   07/258,017                   12/24/91
5,075,466                   07/694,259                   12/24/91
5,075,469                   07/550,462                   12/24/91
5,075,471                   07/595,072                   12/24/91
5,075,472                   07/589,536                   12/24/91
5,075,476                   07/529,896                   12/24/91
5,075,479                   07/702,555                   12/24/91
5,075,481                   07/572,729                   12/24/91
5,075,482                   07/572,728                   12/24/91
5,075,483                   07/572,749                   12/24/91
5,075,484                   07/572,747                   12/24/91
5,075,488                   07/066,735                   12/24/91
5,075,490                   07/241,842                   12/24/91
5,075,494                   07/514,790                   12/24/91
5,075,495                   07/530,785                   12/24/91
5,075,500                   07/694,266                   12/24/91
5,075,504                   07/539,751                   12/24/91
5,075,510                   07/631,391                   12/24/91
5,075,514                   07/567,313                   12/24/91
5,075,519                   07/550,938                   12/24/91
5,075,523                   07/577,327                   12/24/91
5,075,526                   07/300,448                   12/24/91
5,075,529                   07/469,303                   12/24/91
5,075,540                   07/566,463                   12/24/91
5,075,541                   07/578,369                   12/24/91
5,075,542                   07/519,141                   12/24/91
5,075,544                   07/531,165                   12/24/91
5,075,545                   07/262,848                   12/24/91
5,075,548                   07/551,762                   12/24/91
5,075,551                   07/666,221                   12/24/91
5,075,560                   07/584,984                   12/24/91
5,075,562                   07/584,983                   12/24/91
5,075,564                   07/484,042                   12/24/91
5,075,566                   07/628,252                   12/24/91
5,075,574                   07/541,112                   12/24/91
5,075,581                   07/557,706                   12/24/91
5,075,590                   07/548,688                   12/24/91
5,075,598                   07/421,988                   12/24/91
5,075,601                   07/514,143                   12/24/91
5,075,603                   07/270,256                   12/24/91
5,075,605                   07/607,733                   12/24/91
5,075,612                   07/610,413                   12/24/91
5,075,620                   07/546,085                   12/24/91
5,075,621                   07/285,974                   12/24/91
5,075,623                   07/508,392                   12/24/91
5,075,630                   07/617,127                   12/24/91
5,075,641                   07/622,251                   12/24/91
5,075,645                   07/564,761                   12/24/91
5,075,647                   07/524,638                   12/24/91
5,075,649                   07/480,095                   12/24/91
5,075,652                   07/370,196                   12/24/91
5,075,654                   07/619,415                   12/24/91
5,075,661                   07/477,987                   12/24/91
5,075,667                   07/443,362                   12/24/91
5,075,672                   07/544,838                   12/24/91
5,075,676                   07/450,904                   12/24/91
5,075,683                   07/365,688                   12/24/91
5,075,692                   07/642,183                   12/24/91
5,075,700                   07/584,303                   12/24/91
5,075,705                   07/628,040                   12/24/91
5,075,716                   07/621,139                   12/24/91
5,075,727                   07/584,711                   12/24/91
5,075,730                   07/661,302                   12/24/91
5,075,735                   07/625,887                   12/24/91
5,075,755                   07/638,355                   12/24/91
5,075,760                   07/532,134                   12/24/91
5,075,799                   07/379,842                   12/24/91
5,075,808                   07/428,848                   12/24/91
5,075,815                   07/519,938                   12/24/91
5,075,820                   07/563,575                   12/24/91
5,075,824                   07/516,633                   12/24/91
5,075,827                   07/606,879                   12/24/91
5,075,835                   07/642,078                   12/24/91
5,075,839                   07/504,820                   12/24/91
5,075,846                   07/414,335                   12/24/91
5,075,849                   07/292,346                   12/24/91
5,075,853                   07/627,563                   12/24/91
5,075,856                   07/383,372                   12/24/91
5,075,859                   07/476,325                   12/24/91
5,075,860                   07/592,931                   12/24/91
5,075,864                   07/414,147                   12/24/91
5,075,867                   07/290,074                   12/24/91
5,075,873                   07/465,218                   12/24/91
5,075,875                   07/512,645                   12/24/91
5,075,876                   07/362,441                   12/24/91
5,075,877                   07/535,380                   12/24/91
5,075,879                   07/420,977                   12/24/91
5,075,883                   07/637,050                   12/24/91
5,075,885                   07/287,980                   12/24/91
5,075,889                   07/439,717                   12/24/91
5,075,893                   07/626,587                   12/24/91

                  PATENTS WHICH EXPIRED ON December 26, 1999
                    DUE TO FAILURE TO PAY MAINTENANCE FEES

Patent                      Application                     Issue
Number                         Number                        Date

5,477,558                   08/397,541                   12/26/95
5,477,560                   08/296,663                   12/26/95
5,477,561                   08/323,223                   12/26/95
5,477,562                   08/332,848                   12/26/95
5,477,563                   08/140,705                   12/26/95
5,477,566                   08/384,961                   12/26/95
5,477,567                   08/227,857                   12/26/95
5,477,568                   08/390,298                   12/26/95
5,477,569                   08/375,586                   12/26/95
5,477,574                   08/190,356                   12/26/95
5,477,575                   08/327,900                   12/26/95
5,477,577                   08/248,598                   12/26/95
5,477,582                   08/391,223                   12/26/95
5,477,597                   08/048,420                   12/26/95
5,477,598                   08/192,360                   12/26/95
5,477,599                   08/228,705                   12/26/95
5,477,601                   08/320,312                   12/26/95
5,477,614                   08/373,102                   12/26/95
5,477,615                   07/991,183                   12/26/95
5,477,618                   08/237,454                   12/26/95
5,477,622                   08/297,881                   12/26/95
5,477,626                   08/268,977                   12/26/95
5,477,629                   08/184,966                   12/26/95
5,477,631                   08/059,976                   12/26/95
5,477,633                   08/163,307                   12/26/95
5,477,634                   08/285,048                   12/26/95
5,477,637                   08/328,487                   12/26/95
5,477,641                   08/087,833                   12/26/95
5,477,642                   08/168,388                   12/26/95
5,477,644                   08/222,691                   12/26/95
5,477,646                   08/180,273                   12/26/95
5,477,653                   08/309,092                   12/26/95
5,477,659                   08/236,502                   12/26/95
5,477,665                   08/294,151                   12/26/95
5,477,674                   08/354,930                   12/26/95
5,477,687                   08/339,898                   12/26/95
5,477,705                   08/233,803                   12/26/95
5,477,709                   08/202,561                   12/26/95
5,477,711                   08/134,596                   12/26/95
5,477,724                   08/273,680                   12/26/95
5,477,725                   08/211,348                   12/26/95
5,477,727                   08/185,792                   12/26/95
5,477,731                   08/248,091                   12/26/95
5,477,733                   08/387,001                   12/26/95
5,477,737                   08/248,354                   12/26/95
5,477,744                   08/123,210                   12/26/95
5,477,747                   08/320,222                   12/26/95
5,477,753                   08/380,599                   12/26/95
5,477,757                   08/301,555                   12/26/95
5,477,758                   08/312,852                   12/26/95
5,477,759                   08/341,048                   12/26/95
5,477,765                   08/217,604                   12/26/95
5,477,767                   08/165,421                   12/26/95
5,477,768                   08/263,359                   12/26/95
5,477,771                   08/103,950                   12/26/95
5,477,773                   08/255,188                   12/26/95
5,477,774                   08/314,625                   12/26/95
5,477,799                   08/294,492                   12/26/95
5,477,800                   08/363,895                   12/26/95
5,477,801                   08/364,670                   12/26/95
5,477,803                   08/268,597                   12/26/95
5,477,806                   08/210,998                   12/26/95
5,477,808                   08/203,220                   12/26/95
5,477,809                   08/264,620                   12/26/95
5,477,810                   08/272,089                   12/26/95
5,477,849                   08/251,502                   12/26/95
5,477,869                   08/247,772                   12/26/95
5,477,871                   08/224,509                   12/26/95
5,477,872                   08/334,944                   12/26/95
5,477,873                   08/302,611                   12/26/95
5,477,876                   08/192,969                   12/26/95
5,477,879                   08/208,281                   12/26/95
5,477,895                   08/275,708                   12/26/95
5,477,897                   08/243,940                   12/26/95
5,477,899                   08/344,933                   12/26/95
5,477,903                   08/252,559                   12/26/95
5,477,909                   08/158,975                   12/26/95
5,477,916                   08/394,609                   12/26/95
5,477,920                   08/410,763                   12/26/95
5,477,926                   07/928,758                   12/26/95
5,477,927                   08/186,969                   12/26/95
5,477,928                   08/237,039                   12/26/95
5,477,931                   08/163,684                   12/26/95
5,477,937                   08/262,437                   12/26/95
5,477,942                   08/321,600                   12/26/95
5,477,952                   08/029,441                   12/26/95
5,477,953                   08/148,620                   12/26/95
5,477,956                   08/232,753                   12/26/95
5,477,957                   08/196,167                   12/26/95
5,477,961                   08/270,038                   12/26/95
5,477,964                   08/364,256                   12/26/95
5,477,965                   08/211,353                   12/26/95
5,477,978                   08/237,164                   12/26/95
5,477,981                   08/231,506                   12/26/95
5,477,992                   08/216,644                   12/26/95
5,477,993                   08/215,620                   12/26/95
5,477,995                   08/161,710                   12/26/95
5,478,002                   08/262,328                   12/26/95
5,478,015                   08/264,602                   12/26/95
5,478,018                   08/310,199                   12/26/95
5,478,022                   08/175,569                   12/26/95
5,478,025                   08/287,909                   12/26/95
5,478,030                   08/266,643                   12/26/95
5,478,031                   08/128,510                   12/26/95
5,478,033                   08/229,670                   12/26/95
5,478,035                   08/169,491                   12/26/95
5,478,036                   08/240,623                   12/26/95
5,478,037                   08/262,623                   12/26/95
5,478,041                   08/163,947                   12/26/95
5,478,048                   08/258,192                   12/26/95
5,478,070                   08/391,455                   12/26/95
5,478,074                   08/244,837                   12/26/95
5,478,075                   08/266,738                   12/26/95
5,478,080                   08/346,400                   12/26/95
5,478,085                   08/388,294                   12/26/95
5,478,086                   08/409,418                   12/26/95
5,478,098                   08/076,901                   12/26/95
5,478,101                   08/267,354                   12/26/95
5,478,102                   08/443,733                   12/26/95
5,478,104                   08/236,463                   12/26/95
5,478,115                   08/291,027                   12/26/95
5,478,118                   08/072,549                   12/26/95
5,478,122                   08/306,889                   12/26/95
5,478,124                   08/385,161                   12/26/95
5,478,128                   08/342,593                   12/26/95
5,478,129                   08/139,969                   12/26/95
5,478,131                   08/421,613                   12/26/95
5,478,132                   08/228,383                   12/26/95
5,478,138                   08/287,743                   12/26/95
5,478,139                   08/066,212                   12/26/95
5,478,140                   08/151,867                   12/26/95
5,478,141                   07/956,015                   12/26/95
5,478,149                   08/431,258                   12/26/95
5,478,153                   08/269,516                   12/26/95
5,478,159                   08/311,258                   12/26/95
5,478,166                   08/194,308                   12/26/95
5,478,168                   08/186,388                   12/26/95
5,478,182                   08/067,787                   12/26/95
5,478,183                   08/274,382                   12/26/95
5,478,186                   08/244,878                   12/26/95
5,478,196                   08/163,330                   12/26/95
5,478,209                   08/273,333                   12/26/95
5,478,213                   08/204,209                   12/26/95
5,478,214                   08/193,803                   12/26/95
5,478,215                   08/337,184                   12/26/95
5,478,231                   08/249,218                   12/26/95
5,478,232                   08/216,103                   12/26/95
5,478,233                   08/290,861                   12/26/95
5,478,241                   08/124,104                   12/26/95
5,478,243                   08/238,890                   12/26/95
5,478,269                   08/385,853                   12/26/95
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