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 20, 2000
                    DUE TO FAILURE TO PAY MAINTENANCE FEES

Patent                            Serial                            Issue
Number                            Number                             Date

4,791,684                       07/116,915                       12/20/88
4,791,686                       06/855,170                       12/20/88
4,791,688                       07/083,606                       12/20/88
4,791,691                       06/855,936                       12/20/88
4,791,693                       06/923,437                       12/20/88
4,791,703                       07/071,546                       12/20/88
4,791,715                       07/033,677                       12/20/88
4,791,728                       07/039,410                       12/20/88
4,791,731                       07/139,620                       12/20/88
4,791,741                       07/092,867                       12/20/88
4,791,746                       06/564,888                       12/20/88
4,791,748                       07/072,895                       12/20/88
4,791,750                       07/168,242                       12/20/88
4,791,761                       06/430,006                       12/20/88
4,791,777                       06/916,759                       12/20/88
4,791,815                       07/033,761                       12/20/88
4,791,824                       07/007,573                       12/20/88
4,791,828                       07/165,182                       12/20/88
4,791,829                       07/112,009                       12/20/88
4,791,840                       06/584,675                       12/20/88
4,791,851                       07/139,132                       12/20/88
4,791,869                       07/126,278                       12/20/88
4,791,923                       06/941,574                       12/20/88
4,791,924                       07/057,276                       12/20/88
4,791,925                       07/108,103                       12/20/88
4,791,944                       07/065,415                       12/20/88
4,791,947                       07/048,259                       12/20/88
4,791,949                       07/088,661                       12/20/88
4,791,953                       07/145,833                       12/20/88
4,791,955                       06/864,665                       12/20/88
4,791,962                       07/187,970                       12/20/88
4,791,963                       06/897,523                       12/20/88
4,791,970                       07/130,093                       12/20/88
4,791,971                       07/048,625                       12/20/88
4,791,975                       07/028,122                       12/20/88
4,791,976                       07/048,278                       12/20/88
4,791,978                       07/125,636                       12/20/88
4,791,980                       07/033,779                       12/20/88
4,791,988                       07/029,004                       12/20/88
4,791,989                       07/150,123                       12/20/88
4,791,990                       06/867,191                       12/20/88
4,792,002                       07/100,289                       12/20/88
4,792,004                       07/101,362                       12/20/88
4,792,007                       07/088,908                       12/20/88
4,792,010                       07/037,858                       12/20/88
4,792,020                       07/133,467                       12/20/88
4,792,022                       06/915,726                       12/20/88
4,792,035                       06/286,698                       12/20/88
4,792,038                       07/126,519                       12/20/88
4,792,042                       07/124,984                       12/20/88
4,792,045                       07/093,712                       12/20/88
4,792,046                       07/100,403                       12/20/88
4,792,050                       07/158,796                       12/20/88
4,792,053                       06/441,112                       12/20/88
4,792,060                       06/888,530                       12/20/88
4,792,061                       06/877,526                       12/20/88
4,792,062                       07/047,122                       12/20/88
4,792,066                       07/069,631                       12/20/88
4,792,069                       07/106,898                       12/20/88
4,792,070                       07/085,184                       12/20/88
4,792,074                       07/072,749                       12/20/88
4,792,076                       07/061,866                       12/20/88
4,792,085                       07/001,797                       12/20/88
4,792,088                       07/156,004                       12/20/88
4,792,091                       07/164,139                       12/20/88
4,792,094                       06/900,413                       12/20/88
4,792,095                       07/038,998                       12/20/88
4,792,100                       07/145,067                       12/20/88
4,792,102                       07/134,880                       12/20/88
4,792,114                       07/083,754                       12/20/88
4,792,115                       07/168,690                       12/20/88
4,792,116                       07/154,107                       12/20/88
4,792,117                       07/036,661                       12/20/88
4,792,123                       07/033,752                       12/20/88
4,792,127                       07/082,796                       12/20/88
4,792,131                       07/108,817                       12/20/88
4,792,142                       07/120,111                       12/20/88
4,792,160                       07/129,288                       12/20/88
4,792,164                       07/018,288                       12/20/88
4,792,165                       07/097,764                       12/20/88
4,792,168                       07/043,253                       12/20/88
4,792,183                       07/114,041                       12/20/88
4,792,188                       06/776,829                       12/20/88
4,792,189                       07/152,108                       12/20/88
4,792,198                       07/064,318                       12/20/88
4,792,206                       07/057,189                       12/20/88
4,792,217                       07/051,624                       12/20/88
4,792,218                       07/139,451                       12/20/88
4,792,227                       07/021,286                       12/20/88
4,792,229                       07/068,188                       12/20/88
4,792,234                       06/816,421                       12/20/88
4,792,235                       07/099,264                       12/20/88
4,792,265                       07/004,809                       12/20/88
4,792,270                       06/879,527                       12/20/88
4,792,271                       06/907,028                       12/20/88
4,792,280                       07/043,057                       12/20/88
4,792,285                       06/437,112                       12/20/88
4,792,293                       07/098,947                       12/20/88
4,792,294                       06/850,801                       12/20/88
4,792,295                       07/022,239                       12/20/88
4,792,301                       07/092,241                       12/20/88
4,792,302                       07/116,186                       12/20/88
4,792,303                       07/101,840                       12/20/88
4,792,304                       06/900,619                       12/20/88
4,792,311                       06/942,505                       12/20/88
4,792,312                       07/091,540                       12/20/88
4,792,319                       07/071,011                       12/20/88
4,792,333                       06/926,666                       12/20/88
4,792,339                       07/005,444                       12/20/88
4,792,340                       07/078,512                       12/20/88
4,792,342                       07/096,994                       12/20/88
4,792,354                       07/011,241                       12/20/88
4,792,358                       07/034,963                       12/20/88
4,792,362                       07/147,597                       12/20/88
4,792,373                       06/746,232                       12/20/88
4,792,377                       07/012,198                       12/20/88
4,792,379                       06/825,684                       12/20/88
4,792,388                       07/136,192                       12/20/88
4,792,389                       07/045,909                       12/20/88
4,792,390                       07/098,838                       12/20/88
4,792,398                       07/084,029                       12/20/88
4,792,402                       06/933,979                       12/20/88
4,792,405                       07/047,397                       12/20/88
4,792,428                       07/090,054                       12/20/88
4,792,433                       06/903,839                       12/20/88
4,792,435                       06/843,024                       12/20/88
4,792,437                       06/904,084                       12/20/88
4,792,438                       07/123,580                       12/20/88
4,792,445                       07/047,511                       12/20/88
4,792,447                       06/498,754                       12/20/88
4,792,450                       06/875,824                       12/20/88
4,792,456                       06/922,524                       12/20/88
4,792,458                       07/069,260                       12/20/88
4,792,459                       07/048,462                       12/20/88
4,792,463                       06/903,134                       12/20/88
4,792,464                       07/056,378                       12/20/88
4,792,479                       06/890,591                       12/20/88
4,792,490                       07/035,795                       12/20/88
4,792,492                       07/080,625                       12/20/88
4,792,496                       07/083,264                       12/20/88
4,792,499                       07/016,715                       12/20/88
4,792,508                       07/069,544                       12/20/88
4,792,520                       06/580,876                       12/20/88
4,792,521                       06/766,106                       12/20/88
4,792,532                       06/946,951                       12/20/88
4,792,545                       06/817,212                       12/20/88
4,792,549                       06/946,031                       12/20/88
4,792,552                       07/096,398                       12/20/88
4,792,571                       06/815,491                       12/20/88
4,792,578                       06/919,352                       12/20/88
4,792,579                       07/157,617                       12/20/88
4,792,581                       06/947,330                       12/20/88
4,792,583                       07/067,194                       12/20/88
4,792,597                       07/138,062                       12/20/88
4,792,599                       07/162,337                       12/20/88
4,792,603                       06/914,515                       12/20/88
4,792,608                       07/090,262                       12/20/88
4,792,623                       06/424,347                       12/20/88
4,792,640                       07/025,416                       12/20/88
4,792,641                       07/029,899                       12/20/88
4,792,643                       07/062,655                       12/20/88
4,792,647                       07/182,250                       12/20/88
4,792,649                       07/124,502                       12/20/88
4,792,651                       07/123,707                       12/20/88
4,792,662                       07/029,967                       12/20/88
4,792,664                       06/946,263                       12/20/88
4,792,674                       07/080,133                       12/20/88
4,792,685                       07/043,946                       12/20/88
4,792,696                       07/058,914                       12/20/88
4,792,697                       07/095,473                       12/20/88
4,792,704                       07/045,348                       12/20/88
4,792,708                       07/124,005                       12/20/88
4,792,709                       07/027,297                       12/20/88
4,792,715                       07/121,645                       12/20/88
4,792,717                       06/487,033                       12/20/88
4,792,722                       07/014,512                       12/20/88
4,792,723                       07/042,610                       12/20/88
4,792,728                       06/743,190                       12/20/88
4,792,736                       07/052,882                       12/20/88
4,792,738                       06/912,520                       12/20/88
4,792,751                       06/812,744                       12/20/88
4,792,754                       06/942,372                       12/20/88
4,792,759                       07/078,895                       12/20/88
4,792,764                       06/921,890                       12/20/88
4,792,765                       06/909,370                       12/20/88
4,792,775                       07/016,717                       12/20/88
4,792,776                       07/100,693                       12/20/88
4,792,784                       06/944,665                       12/20/88
4,792,786                       07/166,735                       12/20/88
4,792,787                       07/010,675                       12/20/88
4,792,790                       06/908,901                       12/20/88
4,792,791                       07/067,983                       12/20/88
4,792,796                       07/013,025                       12/20/88
4,792,798                       07/033,214                       12/20/88
4,792,801                       06/908,240                       12/20/88
4,792,803                       07/059,769                       12/20/88
4,792,804                       07/044,476                       12/20/88
4,792,805                       07/043,406                       12/20/88
4,792,824                       06/920,535                       12/20/88
4,792,839                       07/136,449                       12/20/88
4,792,843                       07/106,890                       12/20/88
4,792,844                       07/075,218                       12/20/88
4,792,845                       07/017,314                       12/20/88
4,792,851                       07/099,091                       12/20/88
4,792,857                       07/161,162                       12/20/88
4,792,858                       07/058,807                       12/20/88
4,792,868                       06/906,745                       12/20/88
4,792,879                       07/089,042                       12/20/88
4,792,892                       07/048,481                       12/20/88
4,792,893                       06/782,534                       12/20/88
4,792,904                       07/140,875                       12/20/88
4,792,911                       06/821,369                       12/20/88
4,792,913                       06/926,642                       12/20/88
4,792,916                       06/878,860                       12/20/88
4,792,918                       07/147,653                       12/20/88
4,792,928                       07/018,467                       12/20/88
4,792,936                       07/077,741                       12/20/88
4,792,937                       07/099,312                       12/20/88
4,792,939                       07/006,171                       12/20/88
4,792,940                       06/941,868                       12/20/88
4,792,941                       06/705,465                       12/20/88
4,792,942                       07/000,668                       12/20/88
4,792,949                       07/030,754                       12/20/88
4,792,951                       06/906,057                       12/20/88
4,792,954                       06/925,433                       12/20/88
4,792,957                       06/944,044                       12/20/88
4,792,963                       06/388,005                       12/20/88
4,792,964                       07/148,984                       12/20/88
4,792,979                       07/082,334                       12/20/88
4,792,998                       07/048,778                       12/20/88

                  PATENTS WHICH EXPIRED ON December 15, 2000
                    DUE TO FAILURE TO PAY MAINTENANCE FEES

Patent                            Serial                            Issue
Number                            Number                             Date

5,170,509                       07/817,344                       12/15/92
5,170,510                       07/755,716                       12/15/92
5,170,523                       07/790,419                       12/15/92
5,170,525                       07/708,506                       12/15/92
5,170,529                       07/714,812                       12/15/92
5,170,535                       07/830,927                       12/15/92
5,170,536                       07/755,507                       12/15/92
5,170,548                       07/750,649                       12/15/92
5,170,552                       07/702,280                       12/15/92
5,170,562                       07/821,434                       12/15/92
5,170,567                       07/223,241                       12/15/92
5,170,569                       07/801,424                       12/15/92
5,170,578                       07/873,979                       12/15/92
5,170,581                       07/701,522                       12/15/92
5,170,585                       07/802,349                       12/15/92
5,170,589                       07/615,420                       12/15/92
5,170,601                       07/651,724                       12/15/92
5,170,602                       07/689,816                       12/15/92
5,170,607                       07/660,523                       12/15/92
5,170,608                       07/665,568                       12/15/92
5,170,614                       07/560,105                       12/15/92
5,170,615                       07/654,765                       12/15/92
5,170,616                       07/790,929                       12/15/92
5,170,619                       07/390,647                       12/15/92
5,170,624                       07/680,763                       12/15/92
5,170,628                       07/763,808                       12/15/92
5,170,636                       07/690,266                       12/15/92
5,170,645                       07/790,060                       12/15/92
5,170,652                       07/785,867                       12/15/92
5,170,657                       07/817,946                       12/15/92
5,170,665                       07/561,020                       12/15/92
5,170,669                       07/675,955                       12/15/92
5,170,670                       07/683,014                       12/15/92
5,170,674                       07/822,037                       12/15/92
5,170,679                       07/727,952                       12/15/92
5,170,687                       07/816,830                       12/15/92
5,170,693                       07/692,328                       12/15/92
5,170,703                       07/828,126                       12/15/92
5,170,707                       07/757,552                       12/15/92
5,170,713                       07/594,795                       12/15/92
5,170,715                       07/763,523                       12/15/92
5,170,720                       07/534,465                       12/15/92
5,170,723                       07/747,455                       12/15/92
5,170,724                       07/796,412                       12/15/92
5,170,729                       07/711,992                       12/15/92
5,170,731                       07/779,469                       12/15/92
5,170,737                       07/826,246                       12/15/92
5,170,738                       07/637,285                       12/15/92
5,170,740                       07/859,107                       12/15/92
5,170,743                       07/635,123                       12/15/92
5,170,745                       07/834,356                       12/15/92
5,170,746                       07/779,325                       12/15/92
5,170,747                       07/865,566                       12/15/92
5,170,750                       07/736,779                       12/15/92
5,170,753                       07/773,613                       12/15/92
5,170,755                       07/846,938                       12/15/92
5,170,757                       07/812,999                       12/15/92
5,170,761                       07/764,717                       12/15/92
5,170,765                       07/843,602                       12/15/92
5,170,770                       07/664,159                       12/15/92
5,170,773                       07/789,654                       12/15/92
5,170,774                       07/670,849                       12/15/92
5,170,777                       07/635,725                       12/15/92
5,170,778                       07/746,806                       12/15/92
5,170,784                       07/618,696                       12/15/92
5,170,797                       07/724,045                       12/15/92
5,170,805                       07/626,073                       12/15/92
5,170,806                       07/611,914                       12/15/92
5,170,808                       07/229,818                       12/15/92
5,170,810                       07/891,192                       12/15/92
5,170,813                       07/790,413                       12/15/92
5,170,824                       07/878,939                       12/15/92
5,170,827                       07/449,888                       12/15/92
5,170,835                       07/652,665                       12/15/92
5,170,836                       07/824,162                       12/15/92
5,170,838                       07/674,705                       12/15/92
5,170,839                       07/683,780                       12/15/92
5,170,844                       07/757,615                       12/15/92
5,170,853                       07/699,760                       12/15/92
5,170,854                       07/718,567                       12/15/92
5,170,863                       07/729,765                       12/15/92
5,170,872                       07/774,498                       12/15/92
5,170,881                       07/478,134                       12/15/92
5,170,882                       07/601,761                       12/15/92
5,170,886                       07/790,629                       12/15/92
5,170,887                       07/744,419                       12/15/92
5,170,888                       07/729,440                       12/15/92
5,170,891                       07/763,303                       12/15/92
5,170,897                       07/859,878                       12/15/92
5,170,898                       07/759,787                       12/15/92
5,170,902                       07/643,640                       12/15/92
5,170,905                       07/731,547                       12/15/92
5,170,907                       07/791,246                       12/15/92
5,170,911                       07/659,024                       12/15/92
5,170,923                       07/771,180                       12/15/92
5,170,941                       07/869,882                       12/15/92
5,170,947                       07/695,515                       12/15/92
5,170,952                       07/725,389                       12/15/92
5,170,954                       07/764,356                       12/15/92
5,170,957                       07/753,819                       12/15/92
5,170,958                       07/411,698                       12/15/92
5,170,960                       07/714,707                       12/15/92
5,170,964                       07/768,573                       12/15/92
5,170,966                       07/866,574                       12/15/92
5,170,969                       07/276,834                       12/15/92
5,170,970                       07/586,444                       12/15/92
5,170,975                       07/710,975                       12/15/92
5,170,977                       07/699,636                       12/15/92
5,170,978                       07/818,335                       12/15/92
5,170,979                       07/843,149                       12/15/92
5,170,991                       07/769,056                       12/15/92
5,170,997                       07/884,893                       12/15/92
5,171,002                       07/817,284                       12/15/92
5,171,011                       07/769,939                       12/15/92
5,171,014                       07/706,175                       12/15/92
5,171,018                       07/821,199                       12/15/92
5,171,028                       07/818,395                       12/15/92
5,171,055                       07/715,538                       12/15/92
5,171,059                       07/791,081                       12/15/92
5,171,060                       07/713,860                       12/15/92
5,171,069                       07/513,137                       12/15/92
5,171,075                       07/852,909                       12/15/92
5,171,078                       07/875,975                       12/15/92
5,171,087                       07/864,311                       12/15/92
5,171,093                       07/595,149                       12/15/92
5,171,095                       07/671,522                       12/15/92
5,171,097                       07/885,814                       12/15/92
5,171,100                       07/626,273                       12/15/92
5,171,103                       07/768,633                       12/15/92
5,171,104                       07/696,366                       12/15/92
5,171,110                       07/627,313                       12/15/92
5,171,119                       07/723,896                       12/15/92
5,171,120                       07/568,534                       12/15/92
5,171,124                       07/787,116                       12/15/92
5,171,125                       07/720,887                       12/15/92
5,171,129                       07/638,073                       12/15/92
5,171,130                       07/731,324                       12/15/92
5,171,135                       07/735,434                       12/15/92
5,171,136                       07/647,744                       12/15/92
5,171,150                       07/840,923                       12/15/92
5,171,152                       07/833,168                       12/15/92
5,171,153                       07/781,409                       12/15/92
5,171,154                       07/788,703                       12/15/92
5,171,163                       07/809,358                       12/15/92
5,171,168                       07/775,518                       12/15/92
5,171,172                       07/698,377                       12/15/92
5,171,179                       07/322,745                       12/15/92
5,171,181                       07/831,904                       12/15/92
5,171,190                       07/875,679                       12/15/92
5,171,193                       07/659,292                       12/15/92
5,171,200                       07/666,219                       12/15/92
5,171,201                       07/400,799                       12/15/92
5,171,202                       07/821,820                       12/15/92
5,171,205                       07/668,004                       12/15/92
5,171,209                       07/831,043                       12/15/92
5,171,211                       07/710,687                       12/15/92
5,171,213                       07/744,875                       12/15/92
5,171,219                       07/534,874                       12/15/92
5,171,223                       07/648,573                       12/15/92
5,171,224                       07/695,535                       12/15/92
5,171,225                       07/647,974                       12/15/92
5,171,243                       07/781,536                       12/15/92
5,171,250                       07/515,641                       12/15/92
5,171,252                       07/650,869                       12/15/92
5,171,258                       07/780,014                       12/15/92
5,171,261                       07/508,618                       12/15/92
5,171,263                       07/626,546                       12/15/92
5,171,270                       07/502,437                       12/15/92
5,171,282                       07/637,626                       12/15/92
5,171,288                       07/673,367                       12/15/92
5,171,290                       07/754,472                       12/15/92
5,171,292                       07/769,722                       12/15/92
5,171,296                       07/739,919                       12/15/92
5,171,297                       07/871,722                       12/15/92
5,171,301                       07/776,580                       12/15/92
5,171,315                       07/716,234                       12/15/92
5,171,317                       07/873,109                       12/15/92
5,171,318                       07/825,425                       12/15/92
5,171,319                       07/832,970                       12/15/92
5,171,321                       07/848,060                       12/15/92
5,171,322                       07/794,224                       12/15/92
5,171,328                       07/770,865                       12/15/92
5,171,338                       07/726,453                       12/15/92
5,171,345                       07/748,856                       12/15/92
5,171,355                       07/754,883                       12/15/92
5,171,371                       07/553,900                       12/15/92
5,171,372                       07/694,921                       12/15/92
5,171,381                       07/662,721                       12/15/92
5,171,385                       07/326,591                       12/15/92
5,171,399                       07/567,512                       12/15/92
5,171,411                       07/703,663                       12/15/92
5,171,413                       07/760,445                       12/15/92
5,171,422                       07/640,462                       12/15/92
5,171,424                       07/601,834                       12/15/92
5,171,427                       07/800,186                       12/15/92
5,171,428                       07/799,325                       12/15/92
5,171,433                       07/633,868                       12/15/92
5,171,434                       07/735,868                       12/15/92
5,171,437                       07/769,176                       12/15/92
5,171,439                       07/726,478                       12/15/92
5,171,448                       07/619,887                       12/15/92
5,171,449                       07/817,220                       12/15/92
5,171,454                       07/746,830                       12/15/92
5,171,459                       07/850,468                       12/15/92
5,171,460                       07/706,685                       12/15/92
5,171,461                       07/379,309                       12/15/92
5,171,462                       07/812,309                       12/15/92
5,171,465                       07/841,284                       12/15/92
5,171,482                       07/572,538                       12/15/92
5,171,485                       07/770,905                       12/15/92
5,171,486                       07/806,005                       12/15/92
5,171,488                       07/746,986                       12/15/92
5,171,491                       07/652,756                       12/15/92
5,171,508                       07/622,480                       12/15/92
5,171,509                       07/656,008                       12/15/92
5,171,512                       07/666,064                       12/15/92
5,171,517                       07/754,099                       12/15/92
5,171,522                       07/783,804                       12/15/92
5,171,537                       07/695,955                       12/15/92
5,171,548                       07/533,877                       12/15/92
5,171,550                       07/835,032                       12/15/92
5,171,551                       07/583,487                       12/15/92
5,171,552                       07/552,382                       12/15/92
5,171,555                       07/645,448                       12/15/92
5,171,570                       07/623,545                       12/15/92
5,171,577                       07/474,399                       12/15/92
5,171,595                       07/083,914                       12/15/92
5,171,596                       07/607,880                       12/15/92
5,171,604                       07/681,024                       12/15/92
5,171,614                       07/450,863                       12/15/92
5,171,616                       07/486,236                       12/15/92
5,171,623                       07/634,458                       12/15/92
5,171,633                       07/687,881                       12/15/92
5,171,639                       07/657,749                       12/15/92
5,171,648                       07/744,530                       12/15/92
5,171,649                       07/652,707                       12/15/92
5,171,652                       07/672,014                       12/15/92
5,171,661                       07/560,157                       12/15/92
5,171,676                       07/785,993                       12/15/92
5,171,679                       07/461,215                       12/15/92
5,171,687                       07/580,032                       12/15/92
5,171,691                       07/488,155                       12/15/92
5,171,705                       07/795,994                       12/15/92
5,171,707                       07/744,446                       12/15/92
5,171,708                       07/736,546                       12/15/92
5,171,711                       07/774,986                       12/15/92
5,171,722                       07/774,017                       12/15/92
5,171,724                       07/709,963                       12/15/92
5,171,726                       07/679,015                       12/15/92
5,171,727                       07/749,810                       12/15/92
5,171,732                       07/863,390                       12/15/92
5,171,758                       07/632,720                       12/15/92
5,171,760                       07/632,368                       12/15/92
5,171,763                       07/804,377                       12/15/92
5,171,764                       07/656,828                       12/15/92
5,171,770                       07/561,991                       12/15/92
5,171,771                       07/619,557                       12/15/92
5,171,776                       07/717,765                       12/15/92
5,171,783                       07/667,708                       12/15/92
5,171,785                       07/712,154                       12/15/92
5,171,788                       07/595,183                       12/15/92
5,171,797                       07/801,746                       12/15/92
5,171,800                       07/538,083                       12/15/92
5,171,821                       07/359,637                       12/15/92
5,171,829                       07/642,255                       12/15/92
5,171,830                       07/746,674                       12/15/92
5,171,835                       07/647,786                       12/15/92
5,171,838                       07/526,921                       12/15/92
5,171,850                       07/239,084                       12/15/92
5,171,856                       07/781,240                       12/15/92
5,171,858                       07/687,143                       12/15/92
5,171,859                       07/687,144                       12/15/92
5,171,865                       07/664,686                       12/15/92
5,171,867                       07/727,624                       12/15/92
5,171,870                       07/688,751                       12/15/92
5,171,874                       07/396,871                       12/15/92
5,171,878                       07/649,895                       12/15/92
5,171,880                       07/669,719                       12/15/92
5,171,883                       07/596,651                       12/15/92
5,171,890                       06/782,574                       12/15/92
5,171,891                       07/091,625                       12/15/92
5,171,893                       07/801,344                       12/15/92
5,171,896                       07/846,099                       12/15/92
5,171,903                       07/699,495                       12/15/92
5,171,905                       07/736,242                       12/15/92
5,171,918                       07/705,960                       12/15/92
5,171,920                       07/682,290                       12/15/92
5,171,926                       07/651,358                       12/15/92
5,171,927                       07/664,549                       12/15/92
5,171,928                       07/615,976                       12/15/92
5,171,931                       07/822,882                       12/15/92
5,171,953                       07/762,469                       12/15/92
5,171,973                       07/822,324                       12/15/92
5,171,977                       07/523,109                       12/15/92
5,171,981                       07/551,834                       12/15/92
5,171,982                       07/738,578                       12/15/92
5,171,989                       07/826,924                       12/15/92
5,171,995                       07/764,619                       12/15/92
5,171,996                       07/738,529                       12/15/92
5,172,003                       07/796,977                       12/15/92
5,172,010                       07/712,270                       12/15/92
5,172,021                       07/725,566                       12/15/92
5,172,023                       07/771,766                       12/15/92
5,172,037                       07/691,748                       12/15/92
5,172,048                       07/629,407                       12/15/92
5,172,055                       07/778,356                       12/15/92
5,172,059                       07/433,638                       12/15/92
5,172,063                       07/704,522                       12/15/92
5,172,074                       07/704,264                       12/15/92
5,172,080                       07/722,336                       12/15/92
5,172,083                       07/882,598                       12/15/92
5,172,089                       07/715,473                       12/15/92
5,172,091                       07/678,428                       12/15/92
5,172,095                       07/787,548                       12/15/92
5,172,112                       07/792,846                       12/15/92
5,172,123                       06/696,236                       12/15/92
5,172,126                       07/477,868                       12/15/92
5,172,132                       07/664,132                       12/15/92
5,172,146                       07/739,169                       12/15/92
5,172,147                       07/671,193                       12/15/92
5,172,164                       07/622,676                       12/15/92
5,172,180                       07/741,628                       12/15/92
5,172,183                       07/670,584                       12/15/92
5,172,185                       07/634,150                       12/15/92
5,172,186                       07/722,109                       12/15/92
5,172,187                       07/681,154                       12/15/92
5,172,201                       07/583,983                       12/15/92
5,172,215                       07/664,788                       12/15/92
5,172,216                       07/570,250                       12/15/92
5,172,217                       07/487,417                       12/15/92
5,172,228                       07/794,516                       12/15/92
5,172,230                       07/634,636                       12/15/92
5,172,245                       07/483,986                       12/15/92
5,172,250                       07/486,314                       12/15/92
5,172,251                       07/509,062                       12/15/92
5,172,253                       07/790,806                       12/15/92
5,172,265                       07/854,787                       12/15/92
5,172,277                       07/674,829                       12/15/92
5,172,279                       07/846,619                       12/15/92
5,172,287                       07/780,569                       12/15/92
5,172,293                       07/639,528                       12/15/92
5,172,295                       07/645,467                       12/15/92
5,172,297                       07/704,507                       12/15/92
5,172,303                       07/617,323                       12/15/92
5,172,306                       07/678,102                       12/15/92
5,172,325                       07/561,882                       12/15/92
5,172,326                       07/495,716                       12/15/92
5,172,327                       07/415,305                       12/15/92
5,172,333                       07/662,249                       12/15/92
5,172,334                       07/671,325                       12/15/92
5,172,340                       07/714,319                       12/15/92
5,172,342                       07/598,147                       12/15/92
5,172,346                       07/736,945                       12/15/92
5,172,347                       07/474,106                       12/15/92
5,172,350                       07/640,955                       12/15/92
5,172,358                       07/487,425                       12/15/92
5,172,364                       07/558,584                       12/15/92
5,172,372                       07/710,776                       12/15/92
5,172,374                       07/549,371                       12/15/92
5,172,376                       07/706,989                       12/15/92
5,172,378                       07/520,644                       12/15/92
5,172,382                       07/651,008                       12/15/92
5,172,388                       07/734,499                       12/15/92
5,172,389                       07/473,524                       12/15/92
5,172,392                       07/721,382                       12/15/92
5,172,399                       07/755,774                       12/15/92
5,172,401                       07/692,849                       12/15/92

                  PATENTS WHICH EXPIRED ON December 17, 2000
                    DUE TO FAILURE TO PAY MAINTENANCE FEES

Patent                            Serial                            Issue
Number                            Number                             Date

5,584,078                       08/340,547                       12/17/96
5,584,079                       08/509,545                       12/17/96
5,584,082                       08/241,723                       12/17/96
5,584,084                       08/338,681                       12/17/96
5,584,085                       08/320,731                       12/17/96
5,584,088                       08/521,947                       12/17/96
5,584,089                       08/594,178                       12/17/96
5,584,091                       08/401,735                       12/17/96
5,584,110                       08/389,237                       12/17/96
5,584,111                       08/446,279                       12/17/96
5,584,115                       08/249,995                       12/17/96
5,584,116                       08/303,960                       12/17/96
5,584,123                       08/550,644                       12/17/96
5,584,125                       08/470,545                       12/17/96
5,584,127                       08/401,214                       12/17/96
5,584,134                       08/509,697                       12/17/96
5,584,135                       08/452,316                       12/17/96
5,584,136                       08/373,973                       12/17/96
5,584,137                       08/303,860                       12/17/96
5,584,138                       08/524,765                       12/17/96
5,584,139                       08/568,191                       12/17/96
5,584,140                       08/589,098                       12/17/96
5,584,141                       07/741,633                       12/17/96
5,584,156                       08/159,513                       12/17/96
5,584,157                       08/587,986                       12/17/96
5,584,159                       08/377,830                       12/17/96
5,584,165                       08/532,696                       12/17/96
5,584,168                       08/353,511                       12/17/96
5,584,180                       08/344,488                       12/17/96
5,584,181                       08/581,720                       12/17/96
5,584,190                       08/533,616                       12/17/96
5,584,193                       08/233,264                       12/17/96
5,584,195                       08/199,495                       12/17/96
5,584,203                       08/515,680                       12/17/96
5,584,208                       08/414,943                       12/17/96
5,584,210                       08/502,853                       12/17/96
5,584,211                       08/348,804                       12/17/96
5,584,215                       08/402,043                       12/17/96
5,584,219                       08/256,774                       12/17/96
5,584,220                       08/462,041                       12/17/96
5,584,224                       08/541,091                       12/17/96
5,584,245                       08/522,000                       12/17/96
5,584,253                       08/488,481                       12/17/96
5,584,255                       08/473,271                       12/17/96
5,584,258                       08/370,780                       12/17/96
5,584,269                       08/587,689                       12/17/96
5,584,295                       08/523,043                       12/17/96
5,584,302                       08/413,860                       12/17/96
5,584,305                       08/366,299                       12/17/96
5,584,309                       08/558,250                       12/17/96
5,584,314                       08/500,150                       12/17/96
5,584,317                       08/570,798                       12/17/96
5,584,321                       08/232,148                       12/17/96
5,584,322                       08/553,653                       12/17/96
5,584,323                       08/483,575                       12/17/96
5,584,326                       08/347,153                       12/17/96
5,584,329                       08/384,662                       12/17/96
5,584,331                       08/564,431                       12/17/96
5,584,345                       08/338,419                       12/17/96
5,584,348                       08/421,748                       12/17/96
5,584,349                       08/404,911                       12/17/96
5,584,351                       08/212,170                       12/17/96
5,584,352                       08/361,394                       12/17/96
5,584,358                       08/480,394                       12/17/96
5,584,362                       08/419,430                       12/17/96
5,584,365                       08/307,225                       12/17/96
5,584,369                       08/425,467                       12/17/96
5,584,372                       08/277,664                       12/17/96
5,584,390                       08/503,232                       12/17/96
5,584,391                       08/499,792                       12/17/96
5,584,393                       08/292,183                       12/17/96
5,584,396                       08/443,251                       12/17/96
5,584,397                       08/539,549                       12/17/96
5,584,398                       08/570,349                       12/17/96
5,584,400                       08/349,044                       12/17/96
5,584,403                       08/490,664                       12/17/96
5,584,404                       08/407,120                       12/17/96
5,584,412                       08/641,421                       12/17/96
5,584,413                       08/489,290                       12/17/96
5,584,414                       08/320,730                       12/17/96
5,584,420                       08/412,548                       12/17/96
5,584,422                       08/246,735                       12/17/96
5,584,423                       08/579,286                       12/17/96
5,584,424                       08/473,115                       12/17/96
5,584,426                       08/506,381                       12/17/96
5,584,430                       08/616,820                       12/17/96
5,584,431                       08/541,940                       12/17/96
5,584,432                       08/434,594                       12/17/96
5,584,444                       08/625,280                       12/17/96
5,584,445                       08/404,275                       12/17/96
5,584,453                       08/343,233                       12/17/96
5,584,455                       08/362,561                       12/17/96
5,584,457                       08/318,290                       12/17/96
5,584,481                       08/673,740                       12/17/96
5,584,484                       08/523,827                       12/17/96
5,584,487                       08/655,881                       12/17/96
5,584,491                       08/438,757                       12/17/96
5,584,495                       08/456,478                       12/17/96
5,584,514                       08/264,987                       12/17/96
5,584,521                       08/343,181                       12/17/96
5,584,524                       08/347,830                       12/17/96
5,584,529                       08/498,644                       12/17/96
5,584,531                       08/608,621                       12/17/96
5,584,536                       08/611,237                       12/17/96
5,584,537                       08/439,500                       12/17/96
5,584,544                       08/330,713                       12/17/96
5,584,549                       08/429,104                       12/17/96
5,584,550                       08/371,132                       12/17/96
5,584,551                       08/410,859                       12/17/96
5,584,554                       08/272,832                       12/17/96
5,584,561                       08/355,991                       12/17/96
5,584,565                       08/578,243                       12/17/96
5,584,566                       08/503,335                       12/17/96
5,584,570                       08/403,810                       12/17/96
5,584,575                       08/384,315                       12/17/96
5,584,577                       08/036,968                       12/17/96
5,584,588                       08/426,063                       12/17/96
5,584,597                       08/403,652                       12/17/96
5,584,599                       08/359,154                       12/17/96
5,584,602                       08/480,683                       12/17/96
5,584,610                       08/172,498                       12/17/96
5,584,611                       08/344,902                       12/17/96
5,584,612                       08/333,610                       12/17/96
5,584,613                       08/621,072                       12/17/96
5,584,614                       08/608,460                       12/17/96
5,584,622                       08/402,338                       12/17/96
5,584,634                       08/104,577                       12/17/96
5,584,643                       08/411,772                       12/17/96
5,584,647                       08/006,162                       12/17/96
5,584,650                       08/411,637                       12/17/96
5,584,657                       08/570,536                       12/17/96
5,584,659                       08/520,681                       12/17/96
5,584,661                       08/498,807                       12/17/96
5,584,665                       08/304,930                       12/17/96
5,584,672                       08/627,932                       12/17/96
5,584,679                       08/636,354                       12/17/96
5,584,680                       08/282,527                       12/17/96
5,584,684                       08/415,210                       12/17/96
5,584,688                       08/274,241                       12/17/96
5,584,690                       08/541,274                       12/17/96
5,584,697                       08/271,004                       12/17/96
5,584,700                       08/358,394                       12/17/96
5,584,707                       08/218,549                       12/17/96
5,584,708                       08/355,388                       12/17/96
5,584,717                       08/342,204                       12/17/96
5,584,726                       08/441,601                       12/17/96
5,584,732                       08/582,530                       12/17/96
5,584,737                       08/283,563                       12/17/96
5,584,741                       08/445,504                       12/17/96
5,584,742                       08/572,129                       12/17/96
5,584,743                       08/556,651                       12/17/96
5,584,757                       08/675,622                       12/17/96
5,584,769                       08/434,385                       12/17/96
5,584,772                       08/357,712                       12/17/96
5,584,780                       08/629,150                       12/17/96
5,584,781                       08/638,736                       12/17/96
5,584,782                       08/498,953                       12/17/96
5,584,784                       08/443,734                       12/17/96
5,584,785                       08/661,232                       12/17/96
5,584,795                       08/244,814                       12/17/96
5,584,797                       08/274,739                       12/17/96
5,584,802                       08/532,841                       12/17/96
5,584,812                       08/358,237                       12/17/96
5,584,818                       08/533,332                       12/17/96
5,584,819                       08/403,213                       12/17/96
5,584,820                       08/519,459                       12/17/96
5,584,831                       08/089,788                       12/17/96
5,584,834                       08/502,809                       12/17/96
5,584,835                       08/303,016                       12/17/96
5,584,848                       08/362,222                       12/17/96
5,584,849                       08/374,375                       12/17/96
5,584,852                       08/422,095                       12/17/96
5,584,876                       08/235,071                       12/17/96
5,584,880                       08/234,039                       12/17/96
5,584,882                       08/486,582                       12/17/96
5,584,884                       08/508,223                       12/17/96
5,584,898                       08/185,926                       12/17/96
5,584,901                       08/297,534                       12/17/96
5,584,928                       08/451,739                       12/17/96
5,584,930                       08/487,507                       12/17/96
5,584,935                       08/431,960                       12/17/96
5,584,969                       08/282,269                       12/17/96
5,584,975                       08/491,192                       12/17/96
5,584,977                       08/265,786                       12/17/96
5,584,993                       08/305,653                       12/17/96
5,585,008                       08/593,512                       12/17/96
5,585,010                       08/491,727                       12/17/96
5,585,022                       08/552,738                       12/17/96
5,585,035                       08/103,271                       12/17/96
5,585,054                       08/400,669                       12/17/96
5,585,059                       08/141,109                       12/17/96
5,585,067                       08/417,680                       12/17/96
5,585,090                       08/199,867                       12/17/96
5,585,107                       08/441,020                       12/17/96
5,585,122                       08/363,699                       12/17/96
5,585,123                       08/420,226                       12/17/96
5,585,124                       08/365,895                       12/17/96
5,585,131                       08/212,076                       12/17/96
5,585,143                       08/277,510                       12/17/96
5,585,151                       08/512,172                       12/17/96
5,585,169                       08/375,735                       12/17/96
5,585,170                       08/485,950                       12/17/96
5,585,196                       08/208,600                       12/17/96
5,585,205                       08/234,392                       12/17/96
5,585,209                       08/360,077                       12/17/96
5,585,243                       08/120,837                       12/17/96
5,585,259                       08/165,304                       12/17/96
5,585,268                       08/128,269                       12/17/96
5,585,289                       08/552,869                       12/17/96
5,585,327                       08/236,300                       12/17/96
5,585,359                       08/315,171                       12/17/96
5,585,364                       08/467,903                       12/17/96
5,585,365                       08/273,095                       12/17/96
5,585,376                       08/522,363                       12/17/96
5,585,378                       08/467,695                       12/17/96
5,585,383                       08/434,082                       12/17/96
5,585,390                       08/437,399                       12/17/96
5,585,393                       08/552,332                       12/17/96
5,585,394                       08/282,547                       12/17/96
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