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 May 10, 2000
                    DUE TO FAILURE TO PAY MAINTENANCE FEES

Patent Number             Serial Number                Issue Date

4,742,578                   06/803,170                   05/10/88
4,742,584                   07/017,094                   05/10/88
4,742,598                   06/917,656                   05/10/88
4,742,610                   06/938,528                   05/10/88
4,742,614                   06/892,442                   05/10/88
4,742,617                   07/054,970                   05/10/88
4,742,618                   07/010,796                   05/10/88
4,742,633                   06/886,561                   05/10/88
4,742,648                   07/086,206                   05/10/88
4,742,652                   07/040,273                   05/10/88
4,742,654                   07/027,947                   05/10/88
4,742,656                   06/931,917                   05/10/88
4,742,657                   06/828,969                   05/10/88
4,742,665                   07/046,581                   05/10/88
4,742,675                   06/750,766                   05/10/88
4,742,676                   06/808,614                   05/10/88
4,742,683                   06/897,331                   05/10/88
4,742,684                   06/660,556                   05/10/88
4,742,696                   06/477,153                   05/10/88
4,742,716                   07/006,262                   05/10/88
4,742,720                   07/020,078                   05/10/88
4,742,732                   06/899,074                   05/10/88
4,742,743                   06/855,833                   05/10/88
4,742,744                   07/014,064                   05/10/88
4,742,753                   07/106,173                   05/10/88
4,742,755                   07/029,633                   05/10/88
4,742,757                   06/930,809                   05/10/88
4,742,760                   07/070,334                   05/10/88
4,742,765                   06/942,528                   05/10/88
4,742,774                   06/520,274                   05/10/88
4,742,776                   07/038,746                   05/10/88
4,742,783                   07/082,153                   05/10/88
4,742,804                   07/010,991                   05/10/88
4,742,811                   07/098,016                   05/10/88
4,742,817                   06/854,823                   05/10/88
4,742,818                   06/920,048                   05/10/88
4,742,822                   06/827,058                   05/10/88
4,742,824                   06/932,232                   05/10/88
4,742,825                   06/903,775                   05/10/88
4,742,829                   06/895,343                   05/10/88
4,742,832                   07/013,913                   05/10/88
4,742,840                   06/943,876                   05/10/88
4,742,845                   07/095,598                   05/10/88
4,742,862                   07/016,359                   05/10/88
4,742,863                   07/042,855                   05/10/88
4,742,866                   06/878,296                   05/10/88
4,742,869                   06/921,182                   05/10/88
4,742,875                   06/841,261                   05/10/88
4,742,881                   06/857,284                   05/10/88
4,742,895                   07/094,355                   05/10/88
4,742,901                   07/020,977                   05/10/88
4,742,906                   06/880,826                   05/10/88
4,742,918                   06/913,028                   05/10/88
4,742,920                   06/912,955                   05/10/88
4,742,928                   07/061,905                   05/10/88
4,742,932                   06/701,172                   05/10/88
4,742,937                   06/827,214                   05/10/88
4,742,938                   06/876,280                   05/10/88
4,742,942                   06/755,701                   05/10/88
4,742,949                   06/739,020                   05/10/88
4,742,954                   07/066,624                   05/10/88
4,742,955                   07/008,497                   05/10/88
4,742,968                   06/860,642                   05/10/88
4,742,969                   06/859,490                   05/10/88
4,742,971                   06/933,645                   05/10/88
4,742,982                   06/455,973                   05/10/88
4,742,989                   07/014,846                   05/10/88
4,743,008                   06/944,240                   05/10/88
4,743,016                   06/784,767                   05/10/88
4,743,017                   06/767,527                   05/10/88
4,743,021                   06/875,971                   05/10/88
4,743,027                   07/034,478                   05/10/88
4,743,031                   07/086,733                   05/10/88
4,743,040                   06/912,567                   05/10/88
4,743,046                   07/012,823                   05/10/88
4,743,059                   07/071,369                   05/10/88
4,743,061                   07/064,660                   05/10/88
4,743,062                   06/909,820                   05/10/88
4,743,066                   06/937,156                   05/10/88
4,743,068                   06/888,763                   05/10/88
4,743,076                   06/940,205                   05/10/88
4,743,086                   06/677,933                   05/10/88
4,743,094                   07/112,632                   05/10/88
4,743,102                   07/033,416                   05/10/88
4,743,103                   06/868,981                   05/10/88
4,743,118                   06/846,115                   05/10/88
4,743,119                   06/895,666                   05/10/88
4,743,122                   06/811,806                   05/10/88
4,743,138                   07/034,513                   05/10/88
4,743,142                   06/872,915                   05/10/88
4,743,143                   06/907,058                   05/10/88
4,743,151                   06/923,626                   05/10/88
4,743,153                   06/901,846                   05/10/88
4,743,155                   06/876,511                   05/10/88
4,743,160                   06/774,697                   05/10/88
4,743,162                   07/083,884                   05/10/88
4,743,167                   06/863,941                   05/10/88
4,743,169                   07/058,708                   05/10/88
4,743,172                   07/020,220                   05/10/88
4,743,176                   06/877,000                   05/10/88
4,743,177                   07/040,714                   05/10/88
4,743,178                   06/838,853                   05/10/88
4,743,185                   07/019,671                   05/10/88
4,743,187                   06/922,999                   05/10/88
4,743,191                   07/033,274                   05/10/88
4,743,196                   06/870,429                   05/10/88
4,743,211                   06/842,989                   05/10/88
4,743,221                   07/028,538                   05/10/88
4,743,225                   06/767,423                   05/10/88
4,743,227                   07/062,155                   05/10/88
4,743,229                   06/912,985                   05/10/88
4,743,235                   06/903,730                   05/10/88
4,743,239                   06/928,021                   05/10/88
4,743,249                   07/061,024                   05/10/88
4,743,250                   06/785,662                   05/10/88
4,743,251                   06/708,425                   05/10/88
4,743,258                   06/722,669                   05/10/88
4,743,260                   06/742,923                   05/10/88
4,743,262                   07/029,849                   05/10/88
4,743,278                   06/874,971                   05/10/88
4,743,280                   06/842,925                   05/10/88
4,743,284                   06/947,252                   05/10/88
4,743,285                   06/891,948                   05/10/88
4,743,288                   06/632,130                   05/10/88
4,743,291                   06/861,647                   05/10/88
4,743,303                   06/881,325                   05/10/88
4,743,309                   06/941,794                   05/10/88
4,743,314                   07/099,371                   05/10/88
4,743,321                   06/784,288                   05/10/88
4,743,326                   06/919,570                   05/10/88
4,743,328                   06/918,836                   05/10/88
4,743,329                   06/831,348                   05/10/88
4,743,337                   06/915,281                   05/10/88
4,743,338                   06/864,219                   05/10/88
4,743,344                   06/844,361                   05/10/88
4,743,345                   06/760,207                   05/10/88
4,743,347                   07/048,643                   05/10/88
4,743,351                   06/703,547                   05/10/88
4,743,361                   06/751,736                   05/10/88
4,743,363                   06/911,475                   05/10/88
4,743,364                   06/590,183                   05/10/88
4,743,372                   06/842,917                   05/10/88
4,743,373                   06/903,914                   05/10/88
4,743,376                   06/735,862                   05/10/88
4,743,378                   06/945,672                   05/10/88
4,743,381                   07/068,371                   05/10/88
4,743,386                   06/769,826                   05/10/88
4,743,389                   06/445,644                   05/10/88
4,743,392                   06/894,312                   05/10/88
4,743,398                   06/855,026                   05/10/88
4,743,399                   07/005,189                   05/10/88
4,743,408                   06/892,026                   05/10/88
4,743,411                   06/895,803                   05/10/88
4,743,418                   06/642,211                   05/10/88
4,743,432                   06/787,654                   05/10/88
4,743,434                   06/847,259                   05/10/88
4,743,440                   06/288,084                   05/10/88
4,743,442                   06/802,388                   05/10/88
4,743,446                   06/897,534                   05/10/88
4,743,447                   07/041,611                   05/10/88
4,743,449                   06/648,961                   05/10/88
4,743,451                   06/895,270                   05/10/88
4,743,454                   06/891,260                   05/10/88
4,743,456                   06/947,679                   05/10/88
4,743,458                   06/736,245                   05/10/88
4,743,459                   06/736,246                   05/10/88
4,743,460                   06/736,247                   05/10/88
4,743,461                   06/736,375                   05/10/88
4,743,477                   07/029,544                   05/10/88
4,743,489                   06/927,175                   05/10/88
4,743,490                   06/832,141                   05/10/88
4,743,492                   06/876,406                   05/10/88
4,743,494                   06/936,410                   05/10/88
4,743,502                   06/883,817                   05/10/88
4,743,508                   06/840,172                   05/10/88
4,743,519                   06/918,110                   05/10/88
4,743,521                   06/851,247                   05/10/88
4,743,535                   06/668,255                   05/10/88
4,743,536                   06/331,339                   05/10/88
4,743,539                   06/672,266                   05/10/88
4,743,543                   06/774,070                   05/10/88
4,743,556                   07/050,112                   05/10/88
4,743,560                   06/593,411                   05/10/88
4,743,563                   07/053,917                   05/10/88
4,743,566                   06/869,482                   05/10/88
4,743,567                   07/084,657                   05/10/88
4,743,583                   07/075,092                   05/10/88
4,743,590                   06/842,373                   05/10/88
4,743,596                   07/062,626                   05/10/88
4,743,609                   06/827,898                   05/10/88
4,743,616                   06/760,411                   05/10/88
4,743,623                   07/084,667                   05/10/88
4,743,626                   07/095,680                   05/10/88
4,743,627                   07/095,679                   05/10/88
4,743,629                   07/069,453                   05/10/88
4,743,639                   07/057,407                   05/10/88
4,743,642                   06/905,106                   05/10/88
4,743,647                   06/944,431                   05/10/88
4,743,651                   06/932,873                   05/10/88
4,743,652                   07/005,400                   05/10/88
4,743,653                   07/061,208                   05/10/88
4,743,655                   07/041,045                   05/10/88
4,743,662                   06/926,168                   05/10/88
4,743,669                   06/783,526                   05/10/88
4,743,673                   06/944,667                   05/10/88
4,743,675                   06/868,285                   05/10/88
4,743,677                   06/893,267                   05/10/88
4,743,682                   06/948,243                   05/10/88
4,743,690                   07/003,960                   05/10/88
4,743,703                   06/533,275                   05/10/88
4,743,710                   06/788,834                   05/10/88
4,743,723                   07/054,100                   05/10/88
4,743,727                   07/038,057                   05/10/88
4,743,729                   07/069,569                   05/10/88
4,743,736                   06/687,842                   05/10/88
4,743,740                   06/785,383                   05/10/88
4,743,752                   07/008,209                   05/10/88
4,743,760                   06/878,136                   05/10/88
4,743,766                   07/075,268                   05/10/88
4,743,781                   06/882,058                   05/10/88
4,743,792                   06/946,917                   05/10/88
4,743,795                   06/874,098                   05/10/88
4,743,801                   07/020,223                   05/10/88
4,743,821                   06/918,447                   05/10/88
4,743,822                   06/898,562                   05/10/88
4,743,847                   07/063,138                   05/10/88
4,743,848                   06/886,506                   05/10/88
4,743,850                   07/097,253                   05/10/88
4,743,857                   06/840,527                   05/10/88
4,743,858                   06/876,543                   05/10/88
4,743,874                   07/039,290                   05/10/88
4,743,881                   06/896,797                   05/10/88
4,743,882                   07/040,106                   05/10/88
4,743,883                   06/737,086                   05/10/88
4,743,898                   07/042,561                   05/10/88
4,743,901                   06/847,270                   05/10/88
4,743,903                   06/811,986                   05/10/88
4,743,905                   06/766,305                   05/10/88
4,743,909                   07/096,226                   05/10/88
4,743,911                   06/835,675                   05/10/88
4,743,914                   06/852,041                   05/10/88
4,743,915                   06/870,275                   05/10/88
4,743,917                   06/779,259                   05/10/88
4,743,939                   07/056,164                   05/10/88
4,743,940                   07/096,735                   05/10/88
4,743,947                   06/936,481                   05/10/88
4,743,951                   06/355,942                   05/10/88
4,743,967                   07/025,671                   05/10/88
4,743,970                   06/920,560                   05/10/88
4,743,971                   06/926,066                   05/10/88
4,743,973                   06/886,952                   05/10/88
4,743,974                   06/943,280                   05/10/88
4,743,976                   06/845,119                   05/10/88
4,743,978                   06/939,886                   05/10/88
4,743,979                   06/848,264                   05/10/88
4,743,989                   06/854,292                   05/10/88
4,743,995                   06/918,184                   05/10/88
4,744,007                   06/896,348                   05/10/88
4,744,009                   06/926,024                   05/10/88
4,744,012                   06/881,039                   05/10/88
4,744,018                   06/912,626                   05/10/88
4,744,030                   06/858,412                   05/10/88
4,744,041                   06/707,709                   05/10/88
4,744,045                   06/687,874                   05/10/88
4,744,048                   06/785,843                   05/10/88
4,744,050                   06/748,907                   05/10/88
4,744,053                   06/757,337                   05/10/88
4,744,065                   07/009,812                   05/10/88
4,744,072                   06/367,516                   05/10/88
4,744,079                   06/913,923                   05/10/88
4,744,080                   06/833,633                   05/10/88
4,744,082                   06/473,393                   05/10/88
4,744,086                   06/870,703                   05/10/88
4,744,094                   06/940,822                   05/10/88
4,744,095                   06/895,528                   05/10/88
4,744,103                   06/803,133                   05/10/88

                     PATENTS WHICH EXPIRED ON May 5, 2000
                    DUE TO FAILURE TO PAY MAINTENANCE FEES

5,109,549                   07/526,660                   05/05/92
5,109,552                   07/585,948                   05/05/92
5,109,557                   07/545,449                   05/05/92
5,109,558                   07/731,124                   05/05/92
5,109,559                   07/643,531                   05/05/92
5,109,560                   07/762,867                   05/05/92
5,109,569                   07/736,367                   05/05/92
5,109,573                   07/589,140                   05/05/92
5,109,581                   07/642,869                   05/05/92
5,109,582                   07/601,661                   05/05/92
5,109,599                   07/686,711                   05/05/92
5,109,612                   07/622,957                   05/05/92
5,109,613                   07/630,450                   05/05/92
5,109,615                   07/704,910                   05/05/92
5,109,619                   07/649,366                   05/05/92
5,109,623                   07/648,570                   05/05/92
5,109,630                   07/461,687                   05/05/92
5,109,631                   07/554,144                   05/05/92
5,109,632                   07/503,588                   05/05/92
5,109,642                   07/571,256                   05/05/92
5,109,653                   07/207,654                   05/05/92
5,109,655                   07/654,254                   05/05/92
5,109,656                   07/654,289                   05/05/92
5,109,657                   07/698,279                   05/05/92
5,109,658                   07/515,144                   05/05/92
5,109,660                   07/508,353                   05/05/92
5,109,672                   07/464,974                   05/05/92
5,109,673                   07/694,370                   05/05/92
5,109,677                   07/660,141                   05/05/92
5,109,680                   07/602,800                   05/05/92
5,109,683                   07/471,499                   05/05/92
5,109,685                   07/686,413                   05/05/92
5,109,686                   07/577,504                   05/05/92
5,109,689                   07/619,188                   05/05/92
5,109,697                   07/644,171                   05/05/92
5,109,699                   07/713,140                   05/05/92
5,109,700                   07/707,441                   05/05/92
5,109,702                   07/549,888                   05/05/92
5,109,704                   07/584,105                   05/05/92
5,109,708                   07/445,955                   05/05/92
5,109,714                   07/410,473                   05/05/92
5,109,723                   07/470,345                   05/05/92
5,109,725                   07/486,011                   05/05/92
5,109,728                   07/736,277                   05/05/92
5,109,736                   07/661,185                   05/05/92
5,109,737                   07/716,209                   05/05/92
5,109,740                   07/616,341                   05/05/92
5,109,743                   07/777,464                   05/05/92
5,109,744                   07/554,350                   05/05/92
5,109,750                   07/538,539                   05/05/92
5,109,751                   07/534,678                   05/05/92
5,109,752                   07/632,531                   05/05/92
5,109,763                   07/629,223                   05/05/92
5,109,768                   07/519,228                   05/05/92
5,109,773                   07/607,315                   05/05/92
5,109,774                   07/699,601                   05/05/92
5,109,777                   07/564,620                   05/05/92
5,109,778                   07/677,501                   05/05/92
5,109,780                   07/729,574                   05/05/92
5,109,781                   07/634,429                   05/05/92
5,109,799                   07/752,274                   05/05/92
5,109,801                   07/586,955                   05/05/92
5,109,804                   07/598,354                   05/05/92
5,109,808                   07/725,823                   05/05/92
5,109,810                   07/587,233                   05/05/92
5,109,831                   07/712,271                   05/05/92
5,109,832                   07/623,369                   05/05/92
5,109,834                   07/743,080                   05/05/92
5,109,850                   07/746,070                   05/05/92
5,109,853                   07/631,746                   05/05/92
5,109,858                   07/650,421                   05/05/92
5,109,860                   07/368,338                   05/05/92
5,109,864                   07/633,611                   05/05/92
5,109,876                   07/511,144                   05/05/92
5,109,877                   07/657,816                   05/05/92
5,109,878                   07/713,294                   05/05/92
5,109,881                   07/571,741                   05/05/92
5,109,886                   07/653,223                   05/05/92
5,109,887                   07/635,584                   05/05/92
5,109,890                   07/667,958                   05/05/92
5,109,904                   07/478,406                   05/05/92
5,109,908                   07/604,975                   05/05/92
5,109,912                   07/261,591                   05/05/92
5,109,914                   07/578,835                   05/05/92
5,109,921                   07/693,986                   05/05/92
5,109,922                   07/490,876                   05/05/92
5,109,923                   07/683,937                   05/05/92
5,109,925                   07/642,491                   05/05/92
5,109,928                   07/569,020                   05/05/92
5,109,931                   07/690,636                   05/05/92
5,109,948                   07/634,142                   05/05/92
5,109,949                   07/574,289                   05/05/92
5,109,968                   07/771,209                   05/05/92
5,109,971                   07/686,199                   05/05/92
5,109,972                   07/384,781                   05/05/92
5,109,973                   07/462,338                   05/05/92
5,109,976                   07/511,689                   05/05/92
5,109,978                   07/732,394                   05/05/92
5,109,979                   07/657,639                   05/05/92
5,109,989                   07/625,882                   05/05/92
5,109,990                   07/664,943                   05/05/92
5,109,992                   07/695,611                   05/05/92
5,109,993                   07/429,697                   05/05/92
5,109,996                   07/701,469                   05/05/92
5,110,002                   07/620,836                   05/05/92
5,110,004                   07/497,476                   05/05/92
5,110,008                   07/414,454                   05/05/92
5,110,013                   07/726,574                   05/05/92
5,110,014                   07/610,820                   05/05/92
5,110,017                   07/744,254                   05/05/92
5,110,020                   07/635,276                   05/05/92
5,110,022                   07/613,244                   05/05/92
5,110,025                   07/490,701                   05/05/92
5,110,037                   07/718,049                   05/05/92
5,110,041                   07/572,068                   05/05/92
5,110,042                   07/720,632                   05/05/92
5,110,045                   07/630,676                   05/05/92
5,110,057                   07/623,017                   05/05/92
5,110,060                   07/595,258                   05/05/92
5,110,061                   07/623,315                   05/05/92
5,110,062                   07/551,832                   05/05/92
5,110,071                   07/510,657                   05/05/92
5,110,076                   07/640,823                   05/05/92
5,110,079                   07/708,743                   05/05/92
5,110,081                   07/588,760                   05/05/92
5,110,094                   07/578,954                   05/05/92
5,110,096                   07/655,507                   05/05/92
5,110,109                   07/692,286                   05/05/92
5,110,110                   07/418,396                   05/05/92
5,110,111                   07/486,332                   05/05/92
5,110,112                   07/613,383                   05/05/92
5,110,113                   07/561,609                   05/05/92
5,110,115                   07/495,594                   05/05/92
5,110,116                   07/519,119                   05/05/92
5,110,117                   07/485,620                   05/05/92
5,110,122                   07/581,979                   05/05/92
5,110,127                   07/643,856                   05/05/92
5,110,135                   07/659,265                   05/05/92
5,110,138                   07/633,227                   05/05/92
5,110,150                   07/689,542                   05/05/92
5,110,152                   07/691,714                   05/05/92
5,110,155                   07/690,354                   05/05/92
5,110,157                   07/615,259                   05/05/92
5,110,159                   07/634,761                   05/05/92
5,110,169                   07/592,714                   05/05/92
5,110,172                   07/627,684                   05/05/92
5,110,181                   07/716,267                   05/05/92
5,110,182                   07/260,598                   05/05/92
5,110,183                   07/131,648                   05/05/92
5,110,184                   07/751,560                   05/05/92
5,110,194                   07/534,088                   05/05/92
5,110,195                   07/670,500                   05/05/92
5,110,204                   07/609,929                   05/05/92
5,110,206                   07/694,486                   05/05/92
5,110,207                   07/698,254                   05/05/92
5,110,208                   07/629,961                   05/05/92
5,110,210                   07/557,421                   05/05/92
5,110,213                   07/454,493                   05/05/92
5,110,222                   07/473,800                   05/05/92
5,110,230                   07/658,890                   05/05/92
5,110,232                   07/694,391                   05/05/92
5,110,233                   07/694,714                   05/05/92
5,110,237                   07/245,825                   05/05/92
5,110,238                   07/729,214                   05/05/92
5,110,239                   07/691,998                   05/05/92
5,110,241                   07/713,268                   05/05/92
5,110,243                   07/555,243                   05/05/92
5,110,244                   07/750,340                   05/05/92
5,110,251                   07/536,770                   05/05/92
5,110,255                   07/733,050                   05/05/92
5,110,256                   07/653,573                   05/05/92
5,110,265                   07/641,857                   05/05/92
5,110,266                   07/485,056                   05/05/92
5,110,273                   07/494,347                   05/05/92
5,110,275                   07/702,917                   05/05/92
5,110,276                   07/458,213                   05/05/92
5,110,288                   07/476,813                   05/05/92
5,110,296                   07/667,824                   05/05/92
5,110,297                   07/297,674                   05/05/92
5,110,298                   07/759,737                   05/05/92
5,110,310                   07/691,122                   05/05/92
5,110,317                   07/709,041                   05/05/92
5,110,323                   07/697,702                   05/05/92
5,110,328                   07/533,413                   05/05/92
5,110,329                   07/540,936                   05/05/92
5,110,343                   07/527,885                   05/05/92
5,110,347                   07/617,707                   05/05/92
5,110,351                   07/639,619                   05/05/92
5,110,353                   07/648,322                   05/05/92
5,110,360                   07/613,821                   05/05/92
5,110,372                   07/674,922                   05/05/92
5,110,373                   07/565,253                   05/05/92
5,110,380                   07/767,603                   05/05/92
5,110,381                   07/541,551                   05/05/92
5,110,387                   07/657,295                   05/05/92
5,110,394                   07/683,648                   05/05/92
5,110,396                   07/538,292                   05/05/92
5,110,399                   07/440,192                   05/05/92
5,110,402                   07/676,708                   05/05/92
5,110,407                   07/658,399                   05/05/92
5,110,408                   07/658,254                   05/05/92
5,110,409                   07/631,866                   05/05/92
5,110,414                   07/660,165                   05/05/92
5,110,426                   07/582,089                   05/05/92
5,110,435                   07/585,083                   05/05/92
5,110,448                   07/668,006                   05/05/92
5,110,454                   07/145,230                   05/05/92
5,110,458                   07/679,686                   05/05/92
5,110,461                   07/577,556                   05/05/92
5,110,462                   07/735,865                   05/05/92
5,110,466                   07/629,559                   05/05/92
5,110,468                   07/641,411                   05/05/92
5,110,470                   07/603,019                   05/05/92
5,110,480                   07/548,324                   05/05/92
5,110,481                   07/698,670                   05/05/92
5,110,482                   07/507,039                   05/05/92
5,110,483                   07/628,643                   05/05/92
5,110,488                   07/437,331                   05/05/92
5,110,491                   07/688,801                   05/05/92
5,110,492                   07/566,549                   05/05/92
5,110,496                   07/663,313                   05/05/92
5,110,504                   07/329,874                   05/05/92
5,110,505                   07/315,626                   05/05/92
5,110,506                   07/430,218                   05/05/92
5,110,509                   07/385,313                   05/05/92
5,110,512                   07/685,662                   05/05/92
5,110,519                   07/549,794                   05/05/92
5,110,532                   07/665,571                   05/05/92
5,110,534                   07/420,729                   05/05/92
5,110,536                   07/613,073                   05/05/92
5,110,537                   07/484,914                   05/05/92
5,110,540                   07/482,804                   05/05/92
5,110,544                   07/618,948                   05/05/92
5,110,546                   07/696,805                   05/05/92
5,110,553                   07/279,014                   05/05/92
5,110,554                   07/460,210                   05/05/92
5,110,572                   07/720,105                   05/05/92
5,110,582                   07/081,636                   05/05/92
5,110,584                   07/601,296                   05/05/92
5,110,590                   07/475,883                   05/05/92
5,110,592                   07/695,071                   05/05/92
5,110,601                   07/666,879                   05/05/92
5,110,617                   07/636,618                   05/05/92
5,110,624                   07/675,554                   05/05/92
5,110,633                   07/570,499                   05/05/92
5,110,637                   07/318,330                   05/05/92
5,110,646                   07/645,809                   05/05/92
5,110,648                   07/456,371                   05/05/92
5,110,655                   07/599,073                   05/05/92
5,110,660                   07/454,483                   05/05/92
5,110,670                   07/365,711                   05/05/92
5,110,671                   07/711,718                   05/05/92
5,110,675                   07/415,181                   05/05/92
5,110,680                   07/241,254                   05/05/92
5,110,685                   07/526,216                   05/05/92
5,110,694                   07/596,139                   05/05/92
5,110,707                   07/471,037                   05/05/92
5,110,711                   07/683,729                   05/05/92
5,110,715                   07/419,584                   05/05/92
5,110,716                   07/513,221                   05/05/92
5,110,717                   07/628,969                   05/05/92
5,110,718                   07/627,620                   05/05/92
5,110,721                   07/309,288                   05/05/92
5,110,736                   07/602,387                   05/05/92
5,110,739                   07/733,065                   05/05/92
5,110,740                   07/403,530                   05/05/92
5,110,745                   07/359,953                   05/05/92
5,110,749                   07/714,723                   05/05/92
5,110,763                   07/643,891                   05/05/92
5,110,770                   07/723,241                   05/05/92
5,110,772                   07/575,102                   05/05/92
5,110,775                   07/635,437                   05/05/92
5,110,785                   07/694,355                   05/05/92
5,110,789                   07/559,379                   05/05/92
5,110,791                   07/584,345                   05/05/92
5,110,792                   07/431,231                   05/05/92
5,110,793                   07/314,432                   05/05/92
5,110,794                   07/494,678                   05/05/92
5,110,795                   07/471,147                   05/05/92
5,110,799                   07/386,071                   05/05/92
5,110,800                   07/395,855                   05/05/92
5,110,801                   07/313,481                   05/05/92
5,110,804                   07/420,120                   05/05/92
5,110,813                   07/414,952                   05/05/92
5,110,818                   07/630,401                   05/05/92
5,110,819                   07/476,403                   05/05/92
5,110,820                   07/611,340                   05/05/92
5,110,822                   07/637,086                   05/05/92
5,110,826                   07/609,777                   05/05/92
5,110,827                   07/603,996                   05/05/92
5,110,829                   07/737,738                   05/05/92
5,110,830                   07/581,840                   05/05/92
5,110,833                   07/500,892                   05/05/92
5,110,838                   07/630,165                   05/05/92
5,110,844                   07/699,072                   05/05/92
5,110,847                   07/632,681                   05/05/92
5,110,849                   07/565,650                   05/05/92
5,110,853                   07/573,484                   05/05/92
5,110,858                   07/500,048                   05/05/92
5,110,860                   07/587,782                   05/05/92
5,110,863                   07/590,770                   05/05/92
5,110,864                   07/747,302                   05/05/92
5,110,867                   07/581,483                   05/05/92
5,110,874                   07/510,929                   05/05/92
5,110,876                   07/562,468                   05/05/92
5,110,883                   07/667,707                   05/05/92
5,110,884                   07/664,239                   05/05/92
5,110,887                   07/761,572                   05/05/92
5,110,891                   07/683,898                   05/05/92
5,110,895                   07/566,172                   05/05/92
5,110,909                   07/340,826                   05/05/92
5,110,912                   07/487,604                   05/05/92
5,110,926                   07/553,631                   05/05/92
5,110,933                   07/610,428                   05/05/92
5,110,935                   07/410,885                   05/05/92
5,110,939                   07/419,563                   05/05/92
5,110,942                   07/576,031                   05/05/92
5,110,945                   07/776,039                   05/05/92
5,110,954                   07/551,124                   05/05/92
5,110,956                   07/517,444                   05/05/92
5,110,958                   07/698,176                   05/05/92
5,110,959                   07/366,059                   05/05/92
5,110,961                   07/628,389                   05/05/92
5,110,967                   07/657,018                   05/05/92
5,110,971                   07/577,713                   05/05/92
5,110,972                   07/732,279                   05/05/92
5,110,973                   07/590,850                   05/05/92
5,110,975                   07/626,493                   05/05/92
5,110,980                   07/409,758                   05/05/92
5,110,982                   07/645,798                   05/05/92
5,110,983                   07/497,553                   05/05/92
5,110,986                   07/186,328                   05/05/92
5,110,994                   07/613,668                   05/05/92
5,110,996                   07/259,360                   05/05/92
5,111,001                   07/509,041                   05/05/92
5,111,005                   07/592,796                   05/05/92
5,111,006                   07/520,757                   05/05/92
5,111,012                   07/523,521                   05/05/92
5,111,027                   07/616,224                   05/05/92
5,111,029                   07/587,662                   05/05/92
5,111,033                   07/759,110                   05/05/92
5,111,034                   07/554,726                   05/05/92
5,111,035                   07/483,915                   05/05/92
5,111,037                   07/548,119                   05/05/92
5,111,042                   07/469,481                   05/05/92
5,111,058                   07/527,272                   05/05/92
5,111,061                   07/704,593                   05/05/92
5,111,065                   07/497,993                   05/05/92
5,111,069                   07/676,133                   05/05/92
5,111,073                   07/581,951                   05/05/92
5,111,074                   07/559,162                   05/05/92
5,111,076                   07/577,791                   05/05/92
5,111,081                   07/630,576                   05/05/92
5,111,082                   07/551,495                   05/05/92
5,111,091                   07/689,051                   05/05/92
5,111,098                   07/463,736                   05/05/92
5,111,099                   07/487,603                   05/05/92
5,111,102                   07/522,209                   05/05/92
5,111,104                   07/762,155                   05/05/92
5,111,111                   07/589,078                   05/05/92
5,111,128                   07/628,959                   05/05/92
5,111,129                   07/520,071                   05/05/92
5,111,133                   07/589,068                   05/05/92
5,111,134                   07/440,523                   05/05/92
5,111,140                   07/489,914                   05/05/92
5,111,144                   07/612,950                   05/05/92
5,111,146                   07/529,987                   05/05/92
5,111,147                   07/490,603                   05/05/92
5,111,167                   07/612,105                   05/05/92
5,111,174                   07/555,041                   05/05/92
5,111,175                   07/633,619                   05/05/92
5,111,180                   07/659,100                   05/05/92
5,111,182                   07/507,357                   05/05/92
5,111,183                   07/676,426                   05/05/92
5,111,188                   07/417,266                   05/05/92
5,111,189                   07/441,461                   05/05/92
5,111,200                   07/453,033                   05/05/92
5,111,210                   07/542,072                   05/05/92
5,111,212                   07/472,017                   05/05/92
5,111,213                   07/468,666                   05/05/92
5,111,224                   07/652,003                   05/05/92
5,111,228                   07/670,635                   05/05/92
5,111,229                   07/641,248                   05/05/92
5,111,230                   07/574,284                   05/05/92
5,111,239                   07/693,365                   05/05/92
5,111,240                   07/477,371                   05/05/92
5,111,258                   07/742,081                   05/05/92
5,111,267                   07/584,059                   05/05/92
5,111,278                   07/676,936                   05/05/92
5,111,285                   07/522,827                   05/05/92
5,111,286                   07/660,085                   05/05/92
5,111,312                   07/654,216                   05/05/92
5,111,314                   07/564,580                   05/05/92
5,111,316                   07/566,104                   05/05/92
5,111,323                   07/358,514                   05/05/92
5,111,326                   07/691,264                   05/05/92
5,111,337                   07/638,363                   05/05/92
5,111,342                   07/560,085                   05/05/92
5,111,345                   07/357,928                   05/05/92
5,111,347                   07/419,249                   05/05/92
5,111,348                   07/044,433                   05/05/92
5,111,350                   07/622,173                   05/05/92
5,111,360                   07/645,716                   05/05/92
5,111,365                   07/717,958                   05/05/92
5,111,366                   07/702,270                   05/05/92
5,111,374                   07/542,903                   05/05/92
5,111,378                   07/560,597                   05/05/92
5,111,389                   07/114,909                   05/05/92
5,111,401                   07/531,483                   05/05/92
5,111,422                   07/577,394                   05/05/92
5,111,426                   07/327,979                   05/05/92
5,111,437                   07/739,951                   05/05/92
5,111,438                   07/783,665                   05/05/92
5,111,439                   07/532,699                   05/05/92
5,111,447                   07/548,203                   05/05/92
5,111,456                   07/567,285                   05/05/92
5,111,458                   07/385,192                   05/05/92
5,111,477                   07/521,981                   05/05/92
5,111,487                   07/384,219                   05/05/92
5,111,494                   07/574,623                   05/05/92
5,111,501                   07/476,837                   05/05/92
5,111,507                   07/556,541                   05/05/92
5,111,508                   07/460,635                   05/05/92
5,111,516                   07/507,406                   05/05/92
5,111,520                   07/659,074                   05/05/92
5,111,521                   07/659,091                   05/05/92
5,111,523                   07/637,235                   05/05/92
5,111,531                   07/462,503                   05/05/92
5,111,532                   07/536,552                   05/05/92
5,111,534                   07/576,744                   05/05/92

                     PATENTS WHICH EXPIRED ON May 7, 2000
                    DUE TO FAILURE TO PAY MAINTENANCE FEES

5,513,392                   08/342,883                   05/07/96
5,513,397                   08/304,518                   05/07/96
5,513,399                   08/319,576                   05/07/96
5,513,400                   08/137,835                   05/07/96
5,513,402                   08/197,961                   05/07/96
5,513,404                   08/345,387                   05/07/96
5,513,405                   08/332,795                   05/07/96
5,513,408                   08/249,154                   05/07/96
5,513,414                   08/163,437                   05/07/96
5,513,432                   08/385,165                   05/07/96
5,513,437                   08/316,919                   05/07/96
5,513,443                   08/372,766                   05/07/96
5,513,447                   08/387,564                   05/07/96
5,513,450                   08/303,819                   05/07/96
5,513,454                   08/248,212                   05/07/96
5,513,462                   08/347,035                   05/07/96
5,513,463                   08/268,199                   05/07/96
5,513,464                   08/337,727                   05/07/96
5,513,469                   08/394,881                   05/07/96
5,513,474                   08/232,176                   05/07/96
5,513,475                   08/245,452                   05/07/96
5,513,476                   08/017,617                   05/07/96
5,513,480                   08/384,581                   05/07/96
5,513,486                   08/345,627                   05/07/96
5,513,494                   08/298,664                   05/07/96
5,513,495                   08/211,878                   05/07/96
5,513,499                   08/225,049                   05/07/96
5,513,501                   08/344,168                   05/07/96
5,513,506                   08/251,021                   05/07/96
5,513,508                   08/143,492                   05/07/96
5,513,517                   08/308,918                   05/07/96
5,513,519                   08/311,414                   05/07/96
5,513,526                   08/279,037                   05/07/96
5,513,530                   08/169,186                   05/07/96
5,513,534                   08/318,292                   05/07/96
5,513,536                   08/328,689                   05/07/96
5,513,539                   08/268,779                   05/07/96
5,513,543                   08/038,127                   05/07/96
5,513,550                   08/235,701                   05/07/96
5,513,552                   08/493,726                   05/07/96
5,513,557                   08/512,166                   05/07/96
5,513,561                   08/279,234                   05/07/96
5,513,568                   08/349,528                   05/07/96
5,513,573                   08/519,536                   05/07/96
5,513,574                   08/334,273                   05/07/96
5,513,575                   08/182,015                   05/07/96
5,513,577                   08/255,041                   05/07/96
5,513,578                   08/194,867                   05/07/96
5,513,580                   08/204,491                   05/07/96
5,513,582                   08/420,631                   05/07/96
5,513,584                   07/498,952                   05/07/96
5,513,591                   08/320,627                   05/07/96
5,513,592                   08/490,356                   05/07/96
5,513,593                   08/221,198                   05/07/96
5,513,596                   08/327,325                   05/07/96
5,513,605                   08/294,175                   05/07/96
5,513,619                   08/380,375                   05/07/96
5,513,621                   08/255,640                   05/07/96
5,513,635                   08/382,564                   05/07/96
5,513,648                   08/202,660                   05/07/96
5,513,653                   08/426,660                   05/07/96
5,513,654                   08/425,713                   05/07/96
5,513,655                   08/348,573                   05/07/96
5,513,660                   08/424,585                   05/07/96
5,513,661                   08/138,453                   05/07/96
5,513,667                   08/348,716                   05/07/96
5,513,669                   08/410,963                   05/07/96
5,513,678                   08/106,394                   05/07/96
5,513,693                   08/211,592                   05/07/96
5,513,696                   08/400,914                   05/07/96
5,513,704                   08/310,668                   05/07/96
5,513,709                   07/704,415                   05/07/96
5,513,710                   08/337,188                   05/07/96
5,513,711                   08/299,484                   05/07/96
5,513,713                   08/188,612                   05/07/96
5,513,715                   08/299,821                   05/07/96
5,513,729                   08/461,738                   05/07/96
5,513,730                   08/394,107                   05/07/96
5,513,731                   08/274,787                   05/07/96
5,513,733                   08/309,120                   05/07/96
5,513,734                   08/254,019                   05/07/96
5,513,739                   08/202,230                   05/07/96
5,513,746                   08/255,425                   05/07/96
5,513,749                   08/439,494                   05/07/96
5,513,750                   08/229,319                   05/07/96
5,513,753                   08/336,121                   05/07/96
5,513,754                   08/455,722                   05/07/96
5,513,762                   08/344,867                   05/07/96
5,513,763                   08/368,752                   05/07/96
5,513,764                   08/189,204                   05/07/96
5,513,770                   08/500,279                   05/07/96
5,513,778                   08/277,628                   05/07/96
5,513,782                   08/244,289                   05/07/96
5,513,783                   08/329,160                   05/07/96
5,513,784                   08/272,150                   05/07/96
5,513,804                   08/396,844                   05/07/96
5,513,805                   08/414,017                   05/07/96
5,513,806                   08/268,276                   05/07/96
5,513,814                   08/252,119                   05/07/96
5,513,816                   08/174,663                   05/07/96
5,513,817                   08/360,209                   05/07/96
5,513,819                   08/258,954                   05/07/96
5,513,829                   08/392,206                   05/07/96
5,513,837                   08/394,651                   05/07/96
5,513,842                   08/315,559                   05/07/96
5,513,843                   08/045,635                   05/07/96
5,513,845                   08/455,733                   05/07/96
5,513,846                   08/334,392                   05/07/96
5,513,847                   08/500,239                   05/07/96
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