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 March 15, 2000
                    DUE TO FAILURE TO PAY MAINTENANCE FEES

Patent                         Serial                       Issue
Number                         Number                        Date

4,730,358                   07/030,461                   03/15/88
4,730,360                   06/760,902                   03/15/88
4,730,362                   06/877,881                   03/15/88
4,730,363                   06/908,285                   03/15/88
4,730,372                   06/892,904                   03/15/88
4,730,374                   06/863,261                   03/15/88
4,730,388                   06/936,950                   03/15/88
4,730,397                   06/764,195                   03/15/88
4,730,400                   06/807,015                   03/15/88
4,730,416                   06/904,568                   03/15/88
4,730,429                   06/943,244                   03/15/88
4,730,438                   06/826,602                   03/15/88
4,730,441                   06/860,950                   03/15/88
4,730,445                   06/874,650                   03/15/88
4,730,448                   06/887,101                   03/15/88
4,730,449                   06/943,887                   03/15/88
4,730,451                   06/930,367                   03/15/88
4,730,452                   06/895,970                   03/15/88
4,730,457                   06/922,276                   03/15/88
4,730,459                   06/768,691                   03/15/88
4,730,461                   07/058,408                   03/15/88
4,730,464                   06/941,635                   03/15/88
4,730,469                   06/905,928                   03/15/88
4,730,471                   06/921,200                   03/15/88
4,730,476                   06/840,018                   03/15/88
4,730,495                   06/875,317                   03/15/88
4,730,500                   06/570,162                   03/15/88
4,730,506                   07/065,109                   03/15/88
4,730,513                   06/914,106                   03/15/88
4,730,522                   06/900,219                   03/15/88
4,730,534                   06/829,498                   03/15/88
4,730,537                   06/931,739                   03/15/88
4,730,541                   06/869,981                   03/15/88
4,730,563                   07/016,706                   03/15/88
4,730,567                   06/313,055                   03/15/88
4,730,579                   06/892,825                   03/15/88
4,730,581                   06/873,604                   03/15/88
4,730,585                   06/878,772                   03/15/88
4,730,593                   06/845,707                   03/15/88
4,730,595                   06/907,255                   03/15/88
4,730,600                   06/331,167                   03/15/88
4,730,612                   06/842,367                   03/15/88
4,730,613                   06/873,951                   03/15/88
4,730,614                   06/872,961                   03/15/88
4,730,623                   06/744,757                   03/15/88
4,730,624                   06/525,332                   03/15/88
4,730,630                   06/923,413                   03/15/88
4,730,645                   07/010,694                   03/15/88
4,730,647                   06/939,090                   03/15/88
4,730,662                   06/603,904                   03/15/88
4,730,666                   06/858,318                   03/15/88
4,730,684                   06/888,182                   03/15/88
4,730,697                   07/001,387                   03/15/88
4,730,702                   07/081,364                   03/15/88
4,730,709                   06/890,984                   03/15/88
4,730,710                   06/939,268                   03/15/88
4,730,712                   07/029,863                   03/15/88
4,730,713                   06/906,909                   03/15/88
4,730,720                   06/904,345                   03/15/88
4,730,722                   07/003,809                   03/15/88
4,730,724                   06/848,892                   03/15/88
4,730,740                   07/021,073                   03/15/88
4,730,743                   06/941,330                   03/15/88
4,730,765                   06/805,201                   03/15/88
4,730,767                   06/847,530                   03/15/88
4,730,768                   06/325,020                   03/15/88
4,730,783                   06/762,699                   03/15/88
4,730,786                   06/892,957                   03/15/88
4,730,790                   07/000,372                   03/15/88
4,730,796                   07/005,305                   03/15/88
4,730,804                   06/790,036                   03/15/88
4,730,809                   06/661,912                   03/15/88
4,730,815                   06/880,173                   03/15/88
4,730,817                   06/804,570                   03/15/88
4,730,827                   06/933,520                   03/15/88
4,730,832                   06/899,136                   03/15/88
4,730,834                   06/853,760                   03/15/88
4,730,837                   06/811,100                   03/15/88
4,730,843                   06/694,666                   03/15/88
4,730,844                   06/863,829                   03/15/88
4,730,845                   06/889,538                   03/15/88
4,730,846                   06/776,515                   03/15/88
4,730,868                   06/890,975                   03/15/88
4,730,875                   07/075,068                   03/15/88
4,730,881                   06/927,591                   03/15/88
4,730,891                   06/839,728                   03/15/88
4,730,903                   06/821,840                   03/15/88
4,730,910                   06/777,371                   03/15/88
4,730,912                   06/700,932                   03/15/88
4,730,914                   06/944,564                   03/15/88
4,730,917                   06/901,259                   03/15/88
4,730,921                   06/793,653                   03/15/88
4,730,924                   06/835,055                   03/15/88
4,730,925                   06/905,330                   03/15/88
4,730,931                   06/866,436                   03/15/88
4,730,934                   07/060,990                   03/15/88
4,730,939                   06/909,780                   03/15/88
4,730,941                   06/894,297                   03/15/88
4,730,953                   06/919,134                   03/15/88
4,730,957                   06/909,604                   03/15/88
4,730,958                   06/787,670                   03/15/88
4,730,963                   06/893,949                   03/15/88
4,730,977                   06/948,370                   03/15/88
4,731,005                   06/876,806                   03/15/88
4,731,018                   06/946,976                   03/15/88
4,731,022                   06/897,218                   03/15/88
4,731,026                   07/030,213                   03/15/88
4,731,028                   07/031,796                   03/15/88
4,731,038                   06/732,011                   03/15/88
4,731,041                   06/908,919                   03/15/88
4,731,050                   06/883,890                   03/15/88
4,731,053                   06/945,749                   03/15/88
4,731,057                   06/892,185                   03/15/88
4,731,058                   06/865,687                   03/15/88
4,731,060                   06/931,089                   03/15/88
4,731,075                   06/810,066                   03/15/88
4,731,083                   06/770,448                   03/15/88
4,731,089                   06/788,065                   03/15/88
4,731,090                   06/680,685                   03/15/88
4,731,092                   07/040,664                   03/15/88
4,731,094                   07/033,322                   03/15/88
4,731,095                   06/776,988                   03/15/88
4,731,097                   06/936,702                   03/15/88
4,731,101                   06/917,417                   03/15/88
4,731,118                   06/935,854                   03/15/88
4,731,120                   07/011,420                   03/15/88
4,731,121                   06/801,176                   03/15/88
4,731,122                   07/031,824                   03/15/88
4,731,125                   06/767,696                   03/15/88
4,731,128                   07/052,337                   03/15/88
4,731,135                   06/837,574                   03/15/88
4,731,136                   06/760,655                   03/15/88
4,731,137                   06/902,481                   03/15/88
4,731,147                   06/858,403                   03/15/88
4,731,158                   06/906,490                   03/15/88
4,731,161                   06/891,106                   03/15/88
4,731,168                   06/830,049                   03/15/88
4,731,173                   06/932,832                   03/15/88
4,731,178                   06/936,850                   03/15/88
4,731,185                   06/513,194                   03/15/88
4,731,186                   06/783,411                   03/15/88
4,731,191                   06/815,417                   03/15/88
4,731,199                   06/879,824                   03/15/88
4,731,200                   06/885,392                   03/15/88
4,731,204                   06/891,909                   03/15/88
4,731,206                   06/816,492                   03/15/88
4,731,210                   06/337,806                   03/15/88
4,731,215                   06/917,186                   03/15/88
4,731,217                   06/764,840                   03/15/88
4,731,219                   06/901,903                   03/15/88
4,731,220                   06/765,466                   03/15/88
4,731,228                   06/874,966                   03/15/88
4,731,237                   06/549,506                   03/15/88
4,731,251                   06/877,989                   03/15/88
4,731,254                   06/896,754                   03/15/88
4,731,262                   06/869,691                   03/15/88
4,731,266                   06/751,491                   03/15/88
4,731,268                   06/891,031                   03/15/88
4,731,269                   06/822,864                   03/15/88
4,731,270                   06/874,395                   03/15/88
4,731,273                   06/752,946                   03/15/88
4,731,276                   06/720,809                   03/15/88
4,731,284                   06/921,673                   03/15/88
4,731,285                   06/905,281                   03/15/88
4,731,288                   06/716,461                   03/15/88
4,731,291                   06/933,488                   03/15/88
4,731,298                   06/775,397                   03/15/88
4,731,300                   06/834,236                   03/15/88
4,731,327                   06/896,583                   03/15/88
4,731,341                   06/913,303                   03/15/88
4,731,349                   06/769,041                   03/15/88
4,731,351                   06/632,935                   03/15/88
4,731,356                   07/058,108                   03/15/88
4,731,358                   06/902,855                   03/15/88
4,731,364                   06/764,289                   03/15/88
4,731,365                   06/944,165                   03/15/88
4,731,367                   06/721,522                   03/15/88
4,731,370                   06/872,408                   03/15/88
4,731,376                   06/898,723                   03/15/88
4,731,381                   06/848,195                   03/15/88
4,731,386                   06/891,184                   03/15/88
4,731,393                   06/873,853                   03/15/88
4,731,402                   06/921,204                   03/15/88
4,731,406                   06/942,388                   03/15/88
4,731,408                   06/811,281                   03/15/88
4,731,409                   07/011,211                   03/15/88
4,731,414                   06/876,614                   03/15/88
4,731,415                   06/847,392                   03/15/88
4,731,416                   06/872,736                   03/15/88
4,731,422                   06/890,484                   03/15/88
4,731,427                   07/032,801                   03/15/88
4,731,428                   06/926,051                   03/15/88
4,731,432                   06/664,785                   03/15/88
4,731,433                   06/761,900                   03/15/88
4,731,437                   06/762,935                   03/15/88
4,731,438                   06/947,875                   03/15/88
4,731,452                   06/498,605                   03/15/88
4,731,454                   07/055,380                   03/15/88
4,731,461                   06/872,329                   03/15/88
4,731,463                   06/894,292                   03/15/88
4,731,469                   06/894,239                   03/15/88
4,731,473                   06/848,078                   03/15/88
4,731,488                   06/873,447                   03/15/88
4,731,496                   06/889,280                   03/15/88
4,731,516                   06/917,124                   03/15/88
4,731,518                   06/940,868                   03/15/88
4,731,527                   06/883,396                   03/15/88
4,731,528                   06/868,398                   03/15/88
4,731,533                   06/918,932                   03/15/88
4,731,535                   06/828,054                   03/15/88
4,731,536                   06/828,065                   03/15/88
4,731,539                   06/900,250                   03/15/88
4,731,541                   06/889,241                   03/15/88
4,731,552                   06/849,249                   03/15/88
4,731,558                   06/926,820                   03/15/88
4,731,566                   06/940,096                   03/15/88
4,731,569                   06/853,614                   03/15/88
4,731,573                   06/865,780                   03/15/88
4,731,576                   06/797,619                   03/15/88
4,731,579                   06/433,468                   03/15/88
4,731,585                   07/018,161                   03/15/88
4,731,593                   06/916,734                   03/15/88
4,731,602                   06/910,518                   03/15/88
4,731,606                   06/762,348                   03/15/88
4,731,609                   06/926,928                   03/15/88
4,731,619                   06/883,715                   03/15/88
4,731,621                   07/029,775                   03/15/88
4,731,630                   06/871,929                   03/15/88
4,731,640                   06/864,940                   03/15/88
4,731,643                   06/789,594                   03/15/88
4,731,656                   06/880,321                   03/15/88
4,731,670                   07/079,383                   03/15/88
4,731,680                   06/943,751                   03/15/88
4,731,697                   07/046,098                   03/15/88
4,731,703                   06/920,607                   03/15/88
4,731,709                   07/025,820                   03/15/88
4,731,723                   06/883,998                   03/15/88
4,731,735                   06/781,862                   03/15/88
4,731,738                   06/466,272                   03/15/88
4,731,739                   06/789,035                   03/15/88
4,731,740                   06/749,866                   03/15/88
4,731,752                   06/852,280                   03/15/88
4,731,753                   06/623,158                   03/15/88
4,731,754                   06/775,541                   03/15/88
4,731,755                   06/849,988                   03/15/88
4,731,760                   06/859,581                   03/15/88
4,731,761                   06/915,679                   03/15/88
4,731,764                   06/906,449                   03/15/88
4,731,770                   06/835,222                   03/15/88
4,731,776                   06/833,181                   03/15/88
4,731,779                   06/893,866                   03/15/88
4,731,784                   06/833,639                   03/15/88
4,731,790                   06/712,028                   03/15/88
4,731,806                   06/842,555                   03/15/88
4,731,820                   07/029,311                   03/15/88
4,731,826                   06/791,262                   03/15/88
4,731,829                   07/030,263                   03/15/88
4,731,830                   06/784,085                   03/15/88
4,731,836                   07/007,484                   03/15/88
4,731,837                   06/909,617                   03/15/88
4,731,848                   06/663,229                   03/15/88
4,731,853                   06/714,455                   03/15/88
4,731,859                   06/778,315                   03/15/88
4,731,860                   06/874,313                   03/15/88
4,731,862                   06/709,662                   03/15/88
4,731,867                   06/854,376                   03/15/88
4,731,868                   06/798,399                   03/15/88
4,731,870                   06/674,128                   03/15/88
4,731,881                   06/880,513                   03/15/88

                    PATENTS WHICH EXPIRED ON March 10, 2000
                    DUE TO FAILURE TO PAY MAINTENANCE FEES

5,093,931                   07/382,522                   03/10/92
5,093,940                   07/649,532                   03/10/92
5,093,947                   07/683,909                   03/10/92
5,093,948                   07/596,702                   03/10/92
5,093,951                   07/529,931                   03/10/92
5,093,953                   07/518,734                   03/10/92
5,093,960                   07/722,307                   03/10/92
5,093,961                   07/606,834                   03/10/92
5,093,964                   07/684,315                   03/10/92
5,093,965                   07/587,079                   03/10/92
5,093,973                   07/601,218                   03/10/92
5,093,976                   07/703,301                   03/10/92
5,093,984                   07/526,069                   03/10/92
5,093,987                   07/631,814                   03/10/92
5,093,988                   07/645,362                   03/10/92
5,093,990                   07/604,058                   03/10/92
5,093,991                   07/608,827                   03/10/92
5,093,995                   07/610,014                   03/10/92
5,093,996                   07/533,465                   03/10/92
5,093,999                   07/546,428                   03/10/92
5,094,002                   07/753,147                   03/10/92
5,094,004                   07/718,701                   03/10/92
5,094,006                   07/467,603                   03/10/92
5,094,008                   07/756,716                   03/10/92
5,094,012                   07/604,027                   03/10/92
5,094,014                   07/617,746                   03/10/92
5,094,017                   07/476,506                   03/10/92
5,094,023                   07/581,743                   03/10/92
5,094,025                   07/513,924                   03/10/92
5,094,026                   07/682,363                   03/10/92
5,094,031                   07/610,704                   03/10/92
5,094,032                   07/584,464                   03/10/92
5,094,033                   07/505,711                   03/10/92
5,094,036                   07/593,112                   03/10/92
5,094,037                   07/588,459                   03/10/92
5,094,040                   07/592,352                   03/10/92
5,094,041                   07/479,376                   03/10/92
5,094,042                   07/638,781                   03/10/92
5,094,055                   07/521,639                   03/10/92
5,094,061                   07/607,532                   03/10/92
5,094,066                   07/564,775                   03/10/92
5,094,067                   07/722,368                   03/10/92
5,094,069                   07/535,529                   03/10/92
5,094,070                   07/505,044                   03/10/92
5,094,074                   07/652,077                   03/10/92
5,094,076                   07/614,926                   03/10/92
5,094,088                   07/442,352                   03/10/92
5,094,090                   07/540,088                   03/10/92
5,094,099                   07/516,206                   03/10/92
5,094,103                   07/516,589                   03/10/92
5,094,114                   07/607,306                   03/10/92
5,094,115                   07/661,236                   03/10/92
5,094,120                   07/523,549                   03/10/92
5,094,124                   07/709,115                   03/10/92
5,094,125                   07/699,621                   03/10/92
5,094,126                   07/461,872                   03/10/92
5,094,127                   07/614,514                   03/10/92
5,094,128                   07/540,265                   03/10/92
5,094,129                   07/628,326                   03/10/92
5,094,130                   07/456,180                   03/10/92
5,094,132                   07/597,563                   03/10/92
5,094,141                   07/750,767                   03/10/92
5,094,142                   07/593,724                   03/10/92
5,094,152                   07/506,267                   03/10/92
5,094,157                   07/568,070                   03/10/92
5,094,161                   07/503,665                   03/10/92
5,094,169                   07/648,576                   03/10/92
5,094,171                   07/534,051                   03/10/92
5,094,172                   07/499,385                   03/10/92
5,094,173                   07/664,116                   03/10/92
5,094,175                   07/668,938                   03/10/92
5,094,179                   07/665,019                   03/10/92
5,094,183                   07/585,682                   03/10/92
5,094,185                   07/558,018                   03/10/92
5,094,186                   07/474,065                   03/10/92
5,094,189                   07/674,740                   03/10/92
5,094,212                   07/500,656                   03/10/92
5,094,220                   07/541,483                   03/10/92
5,094,221                   07/774,323                   03/10/92
5,094,223                   07/696,878                   03/10/92
5,094,228                   07/555,725                   03/10/92
5,094,231                   07/633,672                   03/10/92
5,094,232                   07/547,595                   03/10/92
5,094,234                   07/538,278                   03/10/92
5,094,237                   07/534,162                   03/10/92
5,094,243                   07/544,060                   03/10/92
5,094,245                   07/511,961                   03/10/92
5,094,246                   07/554,690                   03/10/92
5,094,255                   07/307,634                   03/10/92
5,094,257                   07/593,738                   03/10/92
5,094,260                   07/603,502                   03/10/92
5,094,262                   07/705,631                   03/10/92
5,094,279                   07/638,348                   03/10/92
5,094,281                   07/645,998                   03/10/92
5,094,283                   07/605,244                   03/10/92
5,094,286                   07/741,953                   03/10/92
5,094,297                   07/605,733                   03/10/92
5,094,299                   07/487,383                   03/10/92
5,094,300                   07/610,836                   03/10/92
5,094,304                   07/587,882                   03/10/92
5,094,307                   07/561,971                   03/10/92
5,094,320                   07/645,786                   03/10/92
5,094,335                   07/757,866                   03/10/92
5,094,339                   07/640,895                   03/10/92
5,094,343                   07/492,630                   03/10/92
5,094,344                   07/724,116                   03/10/92
5,094,346                   07/696,520                   03/10/92
5,094,349                   07/672,027                   03/10/92
5,094,353                   07/686,931                   03/10/92
5,094,354                   07/685,438                   03/10/92
5,094,362                   07/375,733                   03/10/92
5,094,374                   07/668,287                   03/10/92
5,094,378                   07/629,031                   03/10/92
5,094,381                   07/616,150                   03/10/92
5,094,385                   07/492,053                   03/10/92
5,094,386                   07/664,092                   03/10/92
5,094,388                   07/644,946                   03/10/92
5,094,409                   07/520,193                   03/10/92
5,094,411                   07/600,595                   03/10/92
5,094,414                   07/611,070                   03/10/92
5,094,421                   07/608,984                   03/10/92
5,094,423                   07/586,679                   03/10/92
5,094,424                   07/625,831                   03/10/92
5,094,425                   07/515,866                   03/10/92
5,094,426                   07/516,084                   03/10/92
5,094,428                   07/515,753                   03/10/92
5,094,434                   07/582,234                   03/10/92
5,094,439                   07/689,312                   03/10/92
5,094,445                   07/685,156                   03/10/92
5,094,448                   07/467,687                   03/10/92
5,094,452                   07/392,034                   03/10/92
5,094,453                   07/559,158                   03/10/92
5,094,460                   07/556,163                   03/10/92
5,094,469                   07/615,885                   03/10/92
5,094,474                   07/622,099                   03/10/92
5,094,479                   07/467,266                   03/10/92
5,094,480                   07/619,349                   03/10/92
5,094,485                   07/669,369                   03/10/92
5,094,486                   07/757,230                   03/10/92
5,094,488                   07/545,742                   03/10/92
5,094,490                   07/591,750                   03/10/92
5,094,493                   07/345,652                   03/10/92
5,094,504                   07/699,588                   03/10/92
5,094,507                   07/612,093                   03/10/92
5,094,511                   07/606,271                   03/10/92
5,094,520                   07/660,121                   03/10/92
5,094,521                   07/610,030                   03/10/92
5,094,529                   07/723,713                   03/10/92
5,094,533                   07/657,989                   03/10/92
5,094,534                   07/457,975                   03/10/92
5,094,538                   07/598,003                   03/10/92
5,094,540                   07/683,787                   03/10/92
5,094,543                   07/519,892                   03/10/92
5,094,544                   07/601,164                   03/10/92
5,094,554                   07/596,040                   03/10/92
5,094,557                   07/448,080                   03/10/92
5,094,559                   07/171,570                   03/10/92
5,094,560                   07/620,162                   03/10/92
5,094,561                   07/592,463                   03/10/92
5,094,563                   07/649,060                   03/10/92
5,094,564                   07/518,915                   03/10/92
5,094,572                   07/445,285                   03/10/92
5,094,573                   07/222,604                   03/10/92
5,094,580                   07/690,566                   03/10/92
5,094,581                   07/611,542                   03/10/92
5,094,585                   07/563,635                   03/10/92
5,094,588                   07/570,765                   03/10/92
5,094,595                   07/376,002                   03/10/92
5,094,597                   07/514,668                   03/10/92
5,094,612                   07/439,306                   03/10/92
5,094,616                   07/631,632                   03/10/92
5,094,619                   07/441,371                   03/10/92
5,094,620                   07/556,260                   03/10/92
5,094,631                   07/666,614                   03/10/92
5,094,632                   07/675,310                   03/10/92
5,094,633                   07/705,600                   03/10/92
5,094,635                   07/613,321                   03/10/92
5,094,636                   07/623,606                   03/10/92
5,094,646                   07/559,280                   03/10/92
5,094,652                   07/343,284                   03/10/92
5,094,655                   07/684,559                   03/10/92
5,094,667                   07/496,474                   03/10/92
5,094,669                   07/579,456                   03/10/92
5,094,682                   07/582,251                   03/10/92
5,094,684                   07/554,986                   03/10/92
5,094,686                   07/580,675                   03/10/92
5,094,688                   07/231,796                   03/10/92
5,094,692                   07/524,645                   03/10/92
5,094,694                   07/668,395                   03/10/92
5,094,702                   07/368,457                   03/10/92
5,094,703                   07/252,018                   03/10/92
5,094,711                   07/242,582                   03/10/92
5,094,715                   07/639,799                   03/10/92
5,094,718                   07/597,104                   03/10/92
5,094,723                   07/635,202                   03/10/92
5,094,724                   07/687,507                   03/10/92
5,094,725                   07/680,351                   03/10/92
5,094,728                   07/693,939                   03/10/92
5,094,732                   07/514,512                   03/10/92
5,094,734                   07/388,838                   03/10/92
5,094,735                   07/537,605                   03/10/92
5,094,736                   07/548,115                   03/10/92
5,094,748                   07/681,317                   03/10/92
5,094,749                   07/445,670                   03/10/92
5,094,767                   07/585,184                   03/10/92
5,094,769                   07/193,475                   03/10/92
5,094,771                   07/520,337                   03/10/92
5,094,775                   07/327,125                   03/10/92
5,094,783                   07/546,189                   03/10/92
5,094,790                   07/604,859                   03/10/92
5,094,792                   07/661,713                   03/10/92
5,094,796                   07/668,168                   03/10/92
5,094,798                   07/587,165                   03/10/92
5,094,801                   07/468,448                   03/10/92
5,094,805                   07/486,519                   03/10/92
5,094,816                   07/715,697                   03/10/92
5,094,817                   07/538,002                   03/10/92
5,094,818                   07/347,522                   03/10/92
5,094,819                   07/367,508                   03/10/92
5,094,822                   07/660,175                   03/10/92
5,094,824                   07/620,981                   03/10/92
5,094,827                   07/570,267                   03/10/92
5,094,828                   07/636,055                   03/10/92
5,094,831                   07/558,868                   03/10/92
5,094,840                   07/600,984                   03/10/92
5,094,845                   07/663,511                   03/10/92
5,094,846                   07/554,383                   03/10/92
5,094,847                   07/583,850                   03/10/92
5,094,849                   07/640,792                   03/10/92
5,094,855                   07/618,026                   03/10/92
5,094,856                   07/611,339                   03/10/92
5,094,863                   07/690,386                   03/10/92
5,094,870                   07/653,396                   03/10/92
5,094,871                   07/638,382                   03/10/92
5,094,872                   07/617,405                   03/10/92
5,094,873                   07/639,990                   03/10/92
5,094,880                   07/551,172                   03/10/92
5,094,884                   07/513,545                   03/10/92
5,094,886                   07/422,957                   03/10/92
5,094,890                   07/561,280                   03/10/92
5,094,891                   07/703,583                   03/10/92
5,094,892                   07/659,482                   03/10/92
5,094,893                   07/647,437                   03/10/92
5,094,904                   07/673,970                   03/10/92
5,094,916                   07/629,464                   03/10/92
5,094,917                   07/672,249                   03/10/92
5,094,927                   07/578,505                   03/10/92
5,094,946                   07/476,843                   03/10/92
5,094,948                   07/330,694                   03/10/92
5,094,954                   07/258,275                   03/10/92
5,094,957                   07/625,274                   03/10/92
5,094,963                   07/577,511                   03/10/92
5,094,965                   07/606,276                   03/10/92
5,094,974                   07/488,578                   03/10/92
5,094,979                   07/698,326                   03/10/92
5,094,984                   07/722,363                   03/10/92
5,094,992                   07/590,743                   03/10/92
5,094,995                   07/388,400                   03/10/92
5,095,005                   07/503,926                   03/10/92
5,095,006                   07/553,493                   03/10/92
5,095,008                   07/555,328                   03/10/92
5,095,010                   07/611,619                   03/10/92
5,095,015                   07/557,577                   03/10/92
5,095,020                   07/397,859                   03/10/92
5,095,031                   07/570,248                   03/10/92
5,095,040                   07/653,395                   03/10/92
5,095,043                   07/652,612                   03/10/92
5,095,050                   07/616,506                   03/10/92
5,095,057                   07/451,450                   03/10/92
5,095,059                   07/675,611                   03/10/92
5,095,065                   07/526,863                   03/10/92
5,095,067                   07/184,026                   03/10/92
5,095,074                   07/503,023                   03/10/92
5,095,075                   07/625,505                   03/10/92
5,095,078                   07/508,512                   03/10/92
5,095,080                   07/709,454                   03/10/92
5,095,081                   07/489,493                   03/10/92
5,095,083                   07/501,567                   03/10/92
5,095,084                   07/412,469                   03/10/92
5,095,085                   07/588,786                   03/10/92
5,095,093                   07/609,551                   03/10/92
5,095,094                   07/483,298                   03/10/92
5,095,096                   07/304,842                   03/10/92
5,095,099                   07/625,130                   03/10/92
5,095,102                   07/566,631                   03/10/92
5,095,103                   07/626,606                   03/10/92
5,095,104                   07/563,103                   03/10/92
5,095,106                   07/639,871                   03/10/92
5,095,107                   07/608,772                   03/10/92
5,095,108                   07/575,387                   03/10/92
5,095,111                   07/324,859                   03/10/92
5,095,125                   07/597,006                   03/10/92
5,095,128                   07/608,450                   03/10/92
5,095,131                   07/615,113                   03/10/92
5,095,137                   07/595,639                   03/10/92
5,095,139                   07/514,895                   03/10/92
5,095,146                   07/674,783                   03/10/92
5,095,148                   07/612,985                   03/10/92
5,095,150                   07/674,019                   03/10/92
5,095,152                   07/618,356                   03/10/92
5,095,156                   07/702,837                   03/10/92
5,095,160                   07/719,899                   03/10/92
5,095,161                   07/563,591                   03/10/92
5,095,168                   07/434,852                   03/10/92
5,095,171                   07/681,274                   03/10/92
5,095,178                   07/632,188                   03/10/92
5,095,182                   07/636,112                   03/10/92
5,095,185                   07/464,335                   03/10/92
5,095,194                   07/420,816                   03/10/92
5,095,196                   07/456,797                   03/10/92
5,095,199                   07/405,442                   03/10/92
5,095,201                   07/457,367                   03/10/92
5,095,205                   07/662,930                   03/10/92
5,095,212                   07/559,245                   03/10/92
5,095,215                   07/548,960                   03/10/92
5,095,236                   07/626,475                   03/10/92
5,095,237                   07/639,349                   03/10/92
5,095,239                   07/436,198                   03/10/92
5,095,245                   07/465,317                   03/10/92
5,095,246                   07/620,497                   03/10/92
5,095,252                   07/590,365                   03/10/92
5,095,253                   07/486,162                   03/10/92
5,095,269                   07/528,521                   03/10/92
5,095,270                   07/565,825                   03/10/92
5,095,276                   07/637,679                   03/10/92
5,095,277                   07/468,930                   03/10/92
5,095,286                   07/436,609                   03/10/92
5,095,289                   07/612,331                   03/10/92
5,095,304                   07/411,429                   03/10/92
5,095,312                   07/687,602                   03/10/92
5,095,330                   07/370,652                   03/10/92
5,095,331                   07/426,593                   03/10/92
5,095,333                   07/528,939                   03/10/92
5,095,336                   07/610,872                   03/10/92
5,095,337                   07/618,876                   03/10/92
5,095,347                   07/561,385                   03/10/92
5,095,353                   07/727,195                   03/10/92
5,095,355                   07/554,988                   03/10/92
5,095,359                   07/413,622                   03/10/92
5,095,362                   07/604,133                   03/10/92
5,095,379                   07/685,386                   03/10/92
5,095,389                   07/621,860                   03/10/92
5,095,394                   07/467,526                   03/10/92
5,095,397                   07/559,065                   03/10/92
5,095,400                   07/444,965                   03/10/92
5,095,402                   07/591,778                   03/10/92
5,095,407                   07/397,352                   03/10/92
5,095,409                   07/539,862                   03/10/92
5,095,413                   07/614,018                   03/10/92
5,095,417                   07/459,811                   03/10/92
5,095,419                   07/381,408                   03/10/92
5,095,420                   07/274,062                   03/10/92
5,095,424                   07/384,867                   03/10/92
5,095,426                   07/361,977                   03/10/92
5,095,430                   07/511,960                   03/10/92
5,095,439                   07/368,305                   03/10/92
5,095,464                   07/108,874                   03/10/92
5,095,466                   07/605,332                   03/10/92
5,095,471                   07/502,323                   03/10/92
5,095,475                   07/597,709                   03/10/92
5,095,476                   07/657,333                   03/10/92
5,095,483                   07/735,672                   03/10/92
5,095,484                   07/747,401                   03/10/92
5,095,486                   07/554,416                   03/10/92
5,095,487                   07/627,661                   03/10/92
5,095,507                   07/556,442                   03/10/92
5,095,516                   07/584,709                   03/10/92
5,095,520                   07/534,745                   03/10/92
5,095,522                   07/213,115                   03/10/92
5,095,525                   07/371,167                   03/10/92
5,095,533                   07/498,304                   03/10/92
5,095,536                   07/498,297                   03/10/92

                    PATENTS WHICH EXPIRED ON March 12, 2000
                    DUE TO FAILURE TO PAY MAINTENANCE FEES

5,497,510                   08/205,561                   03/12/96
5,497,512                   08/114,338                   03/12/96
5,497,515                   08/391,359                   03/12/96
5,497,518                   08/185,919                   03/12/96
5,497,520                   08/272,562                   03/12/96
5,497,521                   08/489,544                   03/12/96
5,497,523                   08/497,531                   03/12/96
5,497,525                   08/325,999                   03/12/96
5,497,526                   08/363,965                   03/12/96
5,497,528                   08/506,474                   03/12/96
5,497,529                   08/274,496                   03/12/96
5,497,536                   08/340,219                   03/12/96
5,497,537                   08/279,883                   03/12/96
5,497,555                   08/359,149                   03/12/96
5,497,558                   08/379,374                   03/12/96
5,497,560                   08/379,177                   03/12/96
5,497,563                   08/239,257                   03/12/96
5,497,564                   08/086,948                   03/12/96
5,497,565                   08/395,058                   03/12/96
5,497,567                   08/245,942                   03/12/96
5,497,575                   08/364,213                   03/12/96
5,497,577                   08/401,267                   03/12/96
5,497,579                   08/304,682                   03/12/96
5,497,581                   08/333,314                   03/12/96
5,497,582                   08/450,489                   03/12/96
5,497,583                   08/292,463                   03/12/96
5,497,586                   08/183,433                   03/12/96
5,497,590                   08/398,993                   03/12/96
5,497,597                   08/142,394                   03/12/96
5,497,598                   08/346,916                   03/12/96
5,497,608                   08/194,471                   03/12/96
5,497,609                   08/442,293                   03/12/96
5,497,610                   08/332,257                   03/12/96
5,497,617                   08/086,732                   03/12/96
5,497,627                   08/361,039                   03/12/96
5,497,629                   08/265,451                   03/12/96
5,497,630                   07/955,305                   03/12/96
5,497,634                   08/197,973                   03/12/96
5,497,635                   08/309,963                   03/12/96
5,497,649                   08/414,253                   03/12/96
5,497,652                   08/142,466                   03/12/96
5,497,663                   08/243,601                   03/12/96
5,497,669                   08/053,895                   03/12/96
5,497,684                   08/199,575                   03/12/96
5,497,690                   08/102,644                   03/12/96
5,497,694                   08/304,877                   03/12/96
5,497,695                   08/366,196                   03/12/96
5,497,706                   08/275,261                   03/12/96
5,497,710                   08/354,663                   03/12/96
5,497,712                   08/135,251                   03/12/96
5,497,714                   08/272,802                   03/12/96
5,497,719                   08/155,875                   03/12/96
5,497,732                   08/263,194                   03/12/96
5,497,740                   08/290,784                   03/12/96
5,497,761                   08/210,024                   03/12/96
5,497,765                   08/377,401                   03/12/96
5,497,770                   08/182,264                   03/12/96
5,497,777                   08/311,698                   03/12/96
5,497,793                   08/125,403                   03/12/96
5,497,797                   08/236,401                   03/12/96
5,497,801                   08/302,985                   03/12/96
5,497,803                   08/354,073                   03/12/96
5,497,813                   08/074,803                   03/12/96
5,497,819                   08/413,615                   03/12/96
5,497,821                   08/199,137                   03/12/96
5,497,822                   08/277,919                   03/12/96
5,497,823                   08/176,169                   03/12/96
5,497,825                   08/449,397                   03/12/96
5,497,833                   08/224,698                   03/12/96
5,497,837                   08/221,250                   03/12/96
5,497,839                   08/307,848                   03/12/96
5,497,846                   08/321,289                   03/12/96
5,497,848                   08/337,082                   03/12/96
5,497,850                   08/268,172                   03/12/96
5,497,852                   08/421,046                   03/12/96
5,497,854                   08/300,203                   03/12/96
5,497,856                   08/298,874                   03/12/96
5,497,858                   07/927,118                   03/12/96
5,497,859                   08/305,380                   03/12/96
5,497,865                   08/307,460                   03/12/96
5,497,868                   08/367,109                   03/12/96
5,497,871                   08/208,010                   03/12/96
5,497,890                   08/179,486                   03/12/96
5,497,891                   08/314,636                   03/12/96
5,497,895                   08/318,805                   03/12/96
5,497,898                   08/264,265                   03/12/96
5,497,901                   08/511,368                   03/12/96
5,497,902                   08/335,944                   03/12/96
5,497,904                   08/350,455                   03/12/96
5,497,908                   08/293,044                   03/12/96
5,497,910                   08/238,462                   03/12/96
5,497,911                   08/300,108                   03/12/96
5,497,912                   08/326,257                   03/12/96
5,497,913                   08/167,780                   03/12/96
5,497,914                   08/196,166                   03/12/96
5,497,920                   08/136,011                   03/12/96
5,497,921                   08/349,067                   03/12/96
5,497,922                   08/248,731                   03/12/96
5,497,923                   08/388,727                   03/12/96
5,497,926                   08/247,768                   03/12/96
5,497,927                   08/331,205                   03/12/96
5,497,940                   08/361,651                   03/12/96
5,497,942                   08/185,092                   03/12/96
5,497,943                   08/213,184                   03/12/96
5,497,949                   08/268,296                   03/12/96
5,497,950                   08/273,233                   03/12/96
5,497,958                   08/306,627                   03/12/96
5,497,963                   08/275,752                   03/12/96
5,497,964                   08/213,169                   03/12/96
5,497,967                   08/208,390                   03/12/96
5,497,969                   08/338,453                   03/12/96
5,497,970                   08/326,247                   03/12/96
5,497,971                   08/254,868                   03/12/96
5,497,973                   08/190,780                   03/12/96
5,497,974                   08/220,489                   03/12/96
5,497,975                   08/235,759                   03/12/96
5,497,976                   08/375,418                   03/12/96
5,497,980                   08/062,273                   03/12/96
5,497,982                   08/389,509                   03/12/96
5,497,983                   08/062,501                   03/12/96
5,497,985                   08/122,483                   03/12/96
5,497,987                   08/501,275                   03/12/96
5,497,989                   08/387,109                   03/12/96
5,497,991                   08/377,993                   03/12/96
5,497,993                   08/209,319                   03/12/96
5,497,994                   08/386,373                   03/12/96
5,497,995                   08/283,047                   03/12/96
5,497,997                   08/421,527                   03/12/96
5,498,001                   08/029,387                   03/12/96
5,498,005                   08/344,018                   03/12/96
5,498,008                   08/289,765                   03/12/96
5,498,009                   08/490,244                   03/12/96
5,498,010                   08/216,650                   03/12/96
5,498,015                   08/413,606                   03/12/96
5,498,046                   08/234,428                   03/12/96
5,498,053                   08/217,983                   03/12/96
5,498,058                   08/274,033                   03/12/96
5,498,061                   08/358,312                   03/12/96
5,498,068                   08/388,338                   03/12/96
5,498,076                   08/267,480                   03/12/96
5,498,077                   08/147,069                   03/12/96
5,498,084                   08/355,624                   03/12/96
5,498,086                   08/381,313                   03/12/96
5,498,089                   08/350,800                   03/12/96
5,498,097                   08/173,037                   03/12/96
5,498,100                   08/329,008                   03/12/96
5,498,108                   07/941,126                   03/12/96
5,498,112                   08/088,812                   03/12/96
5,498,117                   08/294,833                   03/12/96
5,498,119                   08/211,441                   03/12/96
5,498,128                   08/212,823                   03/12/96
5,498,134                   08/243,329                   03/12/96
5,498,143                   08/356,145                   03/12/96
5,498,144                   08/224,266                   03/12/96
5,498,161                   08/311,178                   03/12/96
5,498,164                   08/240,006                   03/12/96
5,498,165                   08/272,008                   03/12/96
5,498,169                   08/241,027                   03/12/96
5,498,179                   08/238,246                   03/12/96
5,498,185                   08/311,988                   03/12/96
5,498,189                   08/262,299                   03/12/96
5,498,193                   08/202,083                   03/12/96
5,498,194                   08/309,651                   03/12/96
5,498,205                   08/285,711                   03/12/96
5,498,206                   08/287,138                   03/12/96
5,498,215                   08/138,471                   03/12/96
5,498,218                   08/288,547                   03/12/96
5,498,221                   08/332,129                   03/12/96
5,498,226                   07/488,303                   03/12/96
5,498,237                   08/381,565                   03/12/96
5,498,238                   08/113,273                   03/12/96
5,498,239                   08/423,615                   03/12/96
5,498,251                   08/350,095                   03/12/96
5,498,252                   08/363,920                   03/12/96
5,498,257                   08/104,544                   03/12/96
5,498,278                   08/359,917                   03/12/96
5,498,284                   08/277,313                   03/12/96
5,498,285                   08/163,510                   03/12/96
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