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 April 25, 2001
                    DUE TO FAILURE TO PAY MAINTENANCE FEES

Patent                            Serial                            Issue
Number                            Number                             Date

4,823,410                       06/907,870                       04/25/89
4,823,424                       07/095,765                       04/25/89
4,823,426                       07/158,881                       04/25/89
4,823,435                       07/227,154                       04/25/89
4,823,441                       07/118,959                       04/25/89
4,823,444                       06/840,607                       04/25/89
4,823,459                       07/101,861                       04/25/89
4,823,460                       07/126,384                       04/25/89
4,823,466                       07/115,978                       04/25/89
4,823,476                       07/120,337                       04/25/89
4,823,484                       07/130,493                       04/25/89
4,823,485                       07/127,897                       04/25/89
4,823,488                       07/174,711                       04/25/89
4,823,490                       06/918,773                       04/25/89
4,823,500                       07/116,705                       04/25/89
4,823,509                       07/154,384                       04/25/89
4,823,522                       07/041,180                       04/25/89
4,823,525                       07/243,916                       04/25/89
4,823,526                       07/119,378                       04/25/89
4,823,527                       07/091,692                       04/25/89
4,823,529                       07/026,944                       04/25/89
4,823,531                       07/172,275                       04/25/89
4,823,535                       07/152,022                       04/25/89
4,823,539                       07/089,371                       04/25/89
4,823,540                       07/050,787                       04/25/89
4,823,543                       07/069,479                       04/25/89
4,823,544                       07/146,937                       04/25/89
4,823,547                       07/089,340                       04/25/89
4,823,554                       07/220,022                       04/25/89
4,823,565                       07/177,895                       04/25/89
4,823,570                       07/068,422                       04/25/89
4,823,572                       06/902,872                       04/25/89
4,823,574                       06/912,423                       04/25/89
4,823,583                       07/231,623                       04/25/89
4,823,587                       07/111,631                       04/25/89
4,823,598                       07/135,314                       04/25/89
4,823,604                       07/052,889                       04/25/89
4,823,606                       07/210,723                       04/25/89
4,823,607                       07/051,526                       04/25/89
4,823,611                       07/122,048                       04/25/89
4,823,616                       07/067,896                       04/25/89
4,823,624                       07/248,632                       04/25/89
4,823,625                       07/193,660                       04/25/89
4,823,636                       07/043,371                       04/25/89
4,823,637                       07/076,577                       04/25/89
4,823,645                       07/097,720                       04/25/89
4,823,648                       06/427,049                       04/25/89
4,823,652                       07/051,277                       04/25/89
4,823,674                       07/044,850                       04/25/89
4,823,678                       07/112,296                       04/25/89
4,823,679                       07/188,534                       04/25/89
4,823,682                       06/522,884                       04/25/89
4,823,691                       07/166,686                       04/25/89
4,823,703                       07/083,814                       04/25/89
4,823,707                       07/165,073                       04/25/89
4,823,708                       07/165,021                       04/25/89
4,823,724                       07/156,701                       04/25/89
4,823,727                       07/153,225                       04/25/89
4,823,738                       07/031,864                       04/25/89
4,823,744                       07/182,217                       04/25/89
4,823,753                       07/113,735                       04/25/89
4,823,755                       07/137,528                       04/25/89
4,823,758                       07/087,823                       04/25/89
4,823,761                       07/067,699                       04/25/89
4,823,768                       07/122,383                       04/25/89
4,823,777                       07/073,254                       04/25/89
4,823,788                       07/182,456                       04/25/89
4,823,796                       07/034,487                       04/25/89
4,823,799                       07/170,690                       04/25/89
4,823,807                       07/155,033                       04/25/89
4,823,810                       07/159,418                       04/25/89
4,823,814                       07/004,100                       04/25/89
4,823,819                       07/180,244                       04/25/89
4,823,830                       07/144,830                       04/25/89
4,823,831                       07/253,225                       04/25/89
4,823,839                       07/037,808                       04/25/89
4,823,842                       07/158,084                       04/25/89
4,823,843                       07/201,081                       04/25/89
4,823,844                       07/115,338                       04/25/89
4,823,851                       07/165,504                       04/25/89
4,823,858                       07/057,382                       04/25/89
4,823,867                       06/917,024                       04/25/89
4,823,887                       07/174,345                       04/25/89
4,823,888                       07/133,347                       04/25/89
4,823,897                       07/110,865                       04/25/89
4,823,907                       07/051,321                       04/25/89
4,823,909                       07/102,978                       04/25/89
4,823,920                       07/188,939                       04/25/89
4,823,922                       07/069,304                       04/25/89
4,823,932                       07/159,206                       04/25/89
4,823,939                       07/212,064                       04/25/89
4,823,947                       07/124,345                       04/25/89
4,823,954                       07/106,887                       04/25/89
4,823,956                       06/896,420                       04/25/89
4,823,971                       07/024,248                       04/25/89
4,823,978                       07/095,523                       04/25/89
4,823,979                       07/229,716                       04/25/89
4,823,983                       07/105,044                       04/25/89
4,823,985                       07/218,139                       04/25/89
4,824,000                       07/159,527                       04/25/89
4,824,022                       07/153,144                       04/25/89
4,824,026                       07/080,637                       04/25/89
4,824,028                       07/140,754                       04/25/89
4,824,031                       07/138,364                       04/25/89
4,824,032                       07/109,040                       04/25/89
4,824,033                       07/189,801                       04/25/89
4,824,035                       07/160,017                       04/25/89
4,824,041                       07/155,963                       04/25/89
4,824,054                       07/214,894                       04/25/89
4,824,055                       07/009,731                       04/25/89
4,824,058                       07/132,217                       04/25/89
4,824,061                       07/147,437                       04/25/89
4,824,069                       07/212,793                       04/25/89
4,824,070                       07/212,792                       04/25/89
4,824,076                       07/095,139                       04/25/89
4,824,085                       07/051,535                       04/25/89
4,824,087                       07/197,721                       04/25/89
4,824,093                       07/190,873                       04/25/89
4,824,096                       07/074,688                       04/25/89
4,824,099                       07/105,409                       04/25/89
4,824,111                       07/148,634                       04/25/89
4,824,124                       07/112,379                       04/25/89
4,824,129                       07/107,052                       04/25/89
4,824,130                       07/109,660                       04/25/89
4,824,141                       07/034,915                       04/25/89
4,824,142                       07/091,344                       04/25/89
4,824,146                       07/153,078                       04/25/89
4,824,147                       07/051,954                       04/25/89
4,824,155                       07/108,391                       04/25/89
4,824,156                       07/148,077                       04/25/89
4,824,165                       07/108,685                       04/25/89
4,824,179                       06/891,711                       04/25/89
4,824,182                       07/092,974                       04/25/89
4,824,185                       07/220,595                       04/25/89
4,824,189                       07/032,490                       04/25/89
4,824,198                       06/743,271                       04/25/89
4,824,205                       07/094,739                       04/25/89
4,824,214                       07/013,480                       04/25/89
4,824,216                       07/039,721                       04/25/89
4,824,222                       06/902,751                       04/25/89
4,824,225                       07/205,483                       04/25/89
4,824,231                       07/075,415                       04/25/89
4,824,237                       06/826,961                       04/25/89
4,824,248                       07/135,256                       04/25/89
4,824,251                       07/101,102                       04/25/89
4,824,257                       07/145,835                       04/25/89
4,824,259                       07/183,278                       04/25/89
4,824,283                       07/001,699                       04/25/89
4,824,287                       07/157,938                       04/25/89
4,824,298                       07/112,743                       04/25/89
4,824,301                       07/186,996                       04/25/89
4,824,304                       07/076,572                       04/25/89
4,824,307                       07/154,757                       04/25/89
4,824,314                       07/014,903                       04/25/89
4,824,315                       07/075,733                       04/25/89
4,824,322                       06/638,493                       04/25/89
4,824,332                       07/164,833                       04/25/89
4,824,334                       07/115,711                       04/25/89
4,824,340                       07/180,217                       04/25/89
4,824,343                       07/134,356                       04/25/89
4,824,352                       07/109,936                       04/25/89
4,824,355                       07/116,037                       04/25/89
4,824,373                       07/103,648                       04/25/89
4,824,384                       07/136,785                       04/25/89
4,824,388                       07/193,917                       04/25/89
4,824,391                       07/111,951                       04/25/89
4,824,392                       07/118,916                       04/25/89
4,824,397                       07/188,102                       04/25/89
4,824,426                       07/048,266                       04/25/89
4,824,432                       06/843,528                       04/25/89
4,824,436                       07/042,569                       04/25/89
4,824,439                       07/133,323                       04/25/89
4,824,440                       07/020,901                       04/25/89
4,824,441                       07/126,409                       04/25/89
4,824,443                       07/178,452                       04/25/89
4,824,447                       06/947,791                       04/25/89
4,824,449                       07/044,501                       04/25/89
4,824,454                       07/164,408                       04/25/89
4,824,458                       07/024,601                       04/25/89
4,824,472                       07/137,384                       04/25/89
4,824,474                       07/069,022                       04/25/89
4,824,478                       07/161,979                       04/25/89
4,824,484                       07/187,209                       04/25/89
4,824,493                       07/013,887                       04/25/89
4,824,499                       07/215,008                       04/25/89
4,824,502                       07/163,681                       04/25/89
4,824,503                       07/079,596                       04/25/89
4,824,504                       07/137,364                       04/25/89
4,824,516                       06/938,724                       04/25/89
4,824,517                       07/099,437                       04/25/89
4,824,525                       07/108,491                       04/25/89
4,824,530                       07/222,142                       04/25/89
4,824,534                       07/011,936                       04/25/89
4,824,539                       07/139,823                       04/25/89
4,824,552                       07/196,005                       04/25/89
4,824,559                       07/054,442                       04/25/89
4,824,565                       07/150,978                       04/25/89
4,824,573                       07/006,151                       04/25/89
4,824,576                       06/885,202                       04/25/89
4,824,578                       07/023,861                       04/25/89
4,824,582                       06/930,836                       04/25/89
4,824,592                       07/173,327                       04/25/89
4,824,593                       07/084,004                       04/25/89
4,824,599                       07/128,302                       04/25/89
4,824,614                       07/036,331                       04/25/89
4,824,616                       07/200,828                       04/25/89
4,824,621                       07/166,680                       04/25/89
4,824,623                       07/075,820                       04/25/89
4,824,625                       06/907,927                       04/25/89
4,824,627                       07/180,381                       04/25/89
4,824,637                       07/147,047                       04/25/89
4,824,638                       07/176,409                       04/25/89
4,824,642                       06/921,319                       04/25/89
4,824,646                       07/129,118                       04/25/89
4,824,659                       06/742,436                       04/25/89
4,824,662                       07/062,200                       04/25/89
4,824,669                       07/031,487                       04/25/89
4,824,692                       07/078,326                       04/25/89
4,824,695                       06/816,220                       04/25/89
4,824,696                       06/793,107                       04/25/89
4,824,704                       07/173,583                       04/25/89
4,824,709                       07/198,151                       04/25/89
4,824,711                       07/008,242                       04/25/89
4,824,727                       06/613,718                       04/25/89
4,824,728                       07/106,527                       04/25/89
4,824,731                       07/149,560                       04/25/89
4,824,734                       07/070,144                       04/25/89
4,824,762                       07/067,313                       04/25/89
4,824,778                       06/867,554                       04/25/89
4,824,780                       06/703,307                       04/25/89
4,824,786                       07/107,244                       04/25/89
4,824,792                       06/937,026                       04/25/89
4,824,804                       07/187,606                       04/25/89
4,824,812                       07/125,713                       04/25/89
4,824,822                       07/191,821                       04/25/89
4,824,828                       07/202,047                       04/25/89
4,824,830                       07/070,685                       04/25/89
4,824,833                       07/167,344                       04/25/89
4,824,834                       07/105,581                       04/25/89
4,824,836                       07/196,303                       04/25/89
4,824,837                       06/881,779                       04/25/89
4,824,842                       06/829,382                       04/25/89
4,824,849                       07/090,641                       04/25/89
4,824,856                       06/896,154                       04/25/89
4,824,862                       07/197,275                       04/25/89
4,824,867                       06/910,417                       04/25/89
4,824,871                       07/162,126                       04/25/89
4,824,874                       06/905,718                       04/25/89
4,824,877                       07/151,686                       04/25/89
4,824,885                       07/070,179                       04/25/89
4,824,886                       07/229,806                       04/25/89
4,824,897                       07/220,964                       04/25/89
4,824,899                       07/122,712                       04/25/89
4,824,916                       06/885,357                       04/25/89
4,824,925                       07/131,889                       04/25/89
4,824,930                       07/135,174                       04/25/89
4,824,931                       07/155,788                       04/25/89
4,824,942                       07/147,119                       04/25/89
4,824,952                       06/754,286                       04/25/89
4,824,975                       07/049,749                       04/25/89
4,824,977                       07/166,936                       04/25/89
4,824,983                       07/106,561                       04/25/89
4,824,990                       07/041,503                       04/25/89
4,824,994                       06/650,498                       04/25/89
4,824,996                       06/927,907                       04/25/89
4,824,998                       07/122,453                       04/25/89
4,825,003                       07/095,218                       04/25/89
4,825,007                       07/116,734                       04/25/89
4,825,021                       07/155,663                       04/25/89
4,825,027                       07/101,447                       04/25/89
4,825,032                       07/091,472                       04/25/89
4,825,055                       07/102,608                       04/25/89
4,825,060                       07/060,387                       04/25/89
4,825,061                       07/082,546                       04/25/89
4,825,067                       07/136,960                       04/25/89
4,825,073                       07/132,437                       04/25/89
4,825,084                       06/897,992                       04/25/89
4,825,086                       07/073,760                       04/25/89
4,825,094                       07/152,198                       04/25/89
4,825,104                       07/102,418                       04/25/89
4,825,115                       07/204,909                       04/25/89
4,825,116                       07/171,963                       04/25/89
4,825,125                       07/099,026                       04/25/89
4,825,131                       07/115,038                       04/25/89
4,825,149                       07/137,487                       04/25/89
4,825,163                       07/225,781                       04/25/89
4,825,169                       07/071,297                       04/25/89
4,825,173                       07/145,933                       04/25/89
4,825,181                       07/163,560                       04/25/89
4,825,186                       07/134,660                       04/25/89
4,825,196                       07/141,662                       04/25/89
4,825,208                       07/039,432                       04/25/89
4,825,216                       06/805,068                       04/25/89
4,825,219                       07/006,533                       04/25/89
4,825,221                       07/129,241                       04/25/89
4,825,230                       07/058,873                       04/25/89
4,825,244                       07/124,219                       04/25/89
4,825,252                       07/204,618                       04/25/89
4,825,270                       07/009,479                       04/25/89
4,825,274                       06/929,910                       04/25/89
4,825,290                       07/133,299                       04/25/89
4,825,296                       07/085,941                       04/25/89
4,825,298                       07/196,332                       04/25/89
4,825,301                       07/074,773                       04/25/89
4,825,306                       07/024,902                       04/25/89
4,825,319                       07/067,488                       04/25/89
4,825,321                       07/052,709                       04/25/89
4,825,322                       07/211,069                       04/25/89
4,825,325                       07/115,142                       04/25/89
4,825,336                       07/196,775                       04/25/89
4,825,337                       07/194,830                       04/25/89
4,825,357                       07/110,080                       04/25/89
4,825,362                       06/947,431                       04/25/89
4,825,369                       06/870,782                       04/25/89
4,825,379                       06/901,668                       04/25/89
4,825,381                       07/033,298                       04/25/89
4,825,393                       07/041,228                       04/25/89
4,825,394                       06/731,916                       04/25/89
4,825,399                       06/933,635                       04/25/89
4,825,402                       06/848,666                       04/25/89
4,825,409                       06/733,159                       04/25/89
4,825,410                       07/112,348                       04/25/89
4,825,415                       06/938,915                       04/25/89
4,825,421                       06/865,083                       04/25/89
4,825,437                       07/040,382                       04/25/89
4,825,453                       06/788,861                       04/25/89
4,825,463                       07/147,648                       04/25/89
4,825,467                       06/934,810                       04/25/89
4,825,468                       06/923,131                       04/25/89

                    PATENTS WHICH EXPIRED ON April 20, 2001
                    DUE TO FAILURE TO PAY MAINTENANCE FEES

Patent                            Serial                            Issue
Number                            Number                             Date

5,203,033                       07/735,745                       04/20/93
5,203,034                       07/803,476                       04/20/93
5,203,037                       07/805,951                       04/20/93
5,203,041                       07/871,555                       04/20/93
5,203,046                       07/734,143                       04/20/93
5,203,048                       07/832,589                       04/20/93
5,203,060                       07/823,013                       04/20/93
5,203,068                       07/925,827                       04/20/93
5,203,082                       07/750,183                       04/20/93
5,203,083                       07/831,777                       04/20/93
5,203,088                       07/781,199                       04/20/93
5,203,095                       07/900,470                       04/20/93
5,203,097                       07/570,202                       04/20/93
5,203,101                       07/729,945                       04/20/93
5,203,102                       07/797,958                       04/20/93
5,203,107                       07/678,112                       04/20/93
5,203,115                       07/845,935                       04/20/93
5,203,118                       07/843,625                       04/20/93
5,203,119                       07/673,651                       04/20/93
5,203,122                       07/894,404                       04/20/93
5,203,132                       07/761,713                       04/20/93
5,203,137                       07/799,191                       04/20/93
5,203,145                       07/803,280                       04/20/93
5,203,149                       07/912,309                       04/20/93
5,203,150                       07/817,131                       04/20/93
5,203,156                       07/748,832                       04/20/93
5,203,164                       07/654,584                       04/20/93
5,203,169                       07/810,070                       04/20/93
5,203,170                       07/853,089                       04/20/93
5,203,174                       07/726,371                       04/20/93
5,203,177                       07/797,360                       04/20/93
5,203,182                       07/749,916                       04/20/93
5,203,187                       07/902,341                       04/20/93
5,203,197                       07/746,863                       04/20/93
5,203,207                       07/603,497                       04/20/93
5,203,212                       07/654,310                       04/20/93
5,203,219                       07/770,589                       04/20/93
5,203,226                       07/683,812                       04/20/93
5,203,229                       07/875,033                       04/20/93
5,203,233                       07/805,058                       04/20/93
5,203,237                       07/654,400                       04/20/93
5,203,239                       07/774,678                       04/20/93
5,203,241                       07/835,839                       04/20/93
5,203,248                       07/841,061                       04/20/93
5,203,249                       07/753,288                       04/20/93
5,203,257                       07/693,459                       04/20/93
5,203,261                       07/788,331                       04/20/93
5,203,269                       07/651,149                       04/20/93
5,203,271                       07/704,089                       04/20/93
5,203,272                       07/744,451                       04/20/93
5,203,276                       07/853,908                       04/20/93
5,203,278                       07/814,792                       04/20/93
5,203,279                       07/807,962                       04/20/93
5,203,282                       07/793,209                       04/20/93
5,203,285                       07/716,981                       04/20/93
5,203,290                       07/929,434                       04/20/93
5,203,296                       07/865,490                       04/20/93
5,203,305                       07/903,920                       04/20/93
5,203,313                       07/901,491                       04/20/93
5,203,315                       07/931,750                       04/20/93
5,203,316                       07/794,675                       04/20/93
5,203,322                       07/753,847                       04/20/93
5,203,324                       07/679,517                       04/20/93
5,203,340                       07/851,712                       04/20/93
5,203,345                       07/784,210                       04/20/93
5,203,346                       07/739,913                       04/20/93
5,203,349                       07/814,573                       04/20/93
5,203,355                       07/655,706                       04/20/93
5,203,356                       07/711,526                       04/20/93
5,203,357                       07/770,880                       04/20/93
5,203,371                       07/972,298                       04/20/93
5,203,375                       07/657,655                       04/20/93
5,203,376                       07/855,786                       04/20/93
5,203,380                       07/594,118                       04/20/93
5,203,385                       07/861,321                       04/20/93
5,203,386                       07/794,951                       04/20/93
5,203,387                       07/882,503                       04/20/93
5,203,389                       07/972,767                       04/20/93
5,203,390                       07/742,755                       04/20/93
5,203,395                       07/853,906                       04/20/93
5,203,405                       07/829,191                       04/20/93
5,203,421                       07/875,540                       04/20/93
5,203,422                       07/904,458                       04/20/93
5,203,427                       07/883,677                       04/20/93
5,203,430                       07/778,026                       04/20/93
5,203,431                       07/841,143                       04/20/93
5,203,432                       07/793,056                       04/20/93
5,203,438                       07/668,216                       04/20/93
5,203,444                       07/794,737                       04/20/93
5,203,450                       07/834,485                       04/20/93
5,203,451                       07/836,098                       04/20/93
5,203,454                       07/781,105                       04/20/93
5,203,457                       07/867,337                       04/20/93
5,203,458                       07/844,177                       04/20/93
5,203,461                       07/771,621                       04/20/93
5,203,462                       07/738,261                       04/20/93
5,203,467                       07/704,944                       04/20/93
5,203,468                       07/907,067                       04/20/93
5,203,469                       07/890,726                       04/20/93
5,203,482                       07/793,785                       04/20/93
5,203,483                       07/895,147                       04/20/93
5,203,485                       07/418,526                       04/20/93
5,203,487                       07/857,334                       04/20/93
5,203,491                       07/778,366                       04/20/93
5,203,493                       07/863,769                       04/20/93
5,203,498                       07/917,188                       04/20/93
5,203,500                       07/708,750                       04/20/93
5,203,507                       07/625,466                       04/20/93
5,203,509                       07/862,885                       04/20/93
5,203,518                       07/743,450                       04/20/93
5,203,519                       07/662,755                       04/20/93
5,203,520                       07/783,574                       04/20/93
5,203,522                       07/725,140                       04/20/93
5,203,527                       07/845,697                       04/20/93
5,203,528                       07/834,385                       04/20/93
5,203,530                       07/836,916                       04/20/93
5,203,531                       07/843,759                       04/20/93
5,203,532                       07/760,971                       04/20/93
5,203,533                       07/785,764                       04/20/93
5,203,534                       07/629,517                       04/20/93
5,203,535                       07/715,069                       04/20/93
5,203,539                       07/924,098                       04/20/93
5,203,544                       07/727,433                       04/20/93
5,203,561                       07/865,176                       04/20/93
5,203,564                       07/711,159                       04/20/93
5,203,567                       07/886,763                       04/20/93
5,203,568                       07/862,880                       04/20/93
5,203,571                       07/895,329                       04/20/93
5,203,581                       07/741,111                       04/20/93
5,203,583                       07/829,562                       04/20/93
5,203,593                       07/526,707                       04/20/93
5,203,597                       07/720,958                       04/20/93
5,203,601                       07/858,035                       04/20/93
5,203,603                       07/261,366                       04/20/93
5,203,604                       07/879,970                       04/20/93
5,203,618                       07/719,611                       04/20/93
5,203,622                       07/855,590                       04/20/93
5,203,624                       07/880,055                       04/20/93
5,203,625                       07/817,094                       04/20/93
5,203,640                       07/672,697                       04/20/93
5,203,644                       07/751,900                       04/20/93
5,203,646                       07/831,878                       04/20/93
5,203,647                       07/905,431                       04/20/93
5,203,650                       07/819,313                       04/20/93
5,203,651                       07/715,343                       04/20/93
5,203,666                       07/940,534                       04/20/93
5,203,670                       07/907,101                       04/20/93
5,203,671                       07/727,200                       04/20/93
5,203,686                       07/965,542                       04/20/93
5,203,690                       07/814,226                       04/20/93
5,203,692                       07/647,535                       04/20/93
5,203,694                       07/839,630                       04/20/93
5,203,697                       07/705,714                       04/20/93
5,203,701                       07/885,341                       04/20/93
5,203,709                       07/884,437                       04/20/93
5,203,710                       07/821,738                       04/20/93
5,203,713                       07/791,054                       04/20/93
5,203,716                       07/896,937                       04/20/93
5,203,720                       07/772,925                       04/20/93
5,203,724                       07/788,323                       04/20/93
5,203,729                       07/819,091                       04/20/93
5,203,747                       07/774,555                       04/20/93
5,203,753                       07/874,692                       04/20/93
5,203,754                       07/884,945                       04/20/93
5,203,757                       07/826,391                       04/20/93
5,203,766                       07/710,359                       04/20/93
5,203,783                       07/697,323                       04/20/93
5,203,793                       07/805,596                       04/20/93
5,203,798                       07/720,001                       04/20/93
5,203,812                       07/598,504                       04/20/93
5,203,818                       07/787,625                       04/20/93
5,203,821                       07/813,760                       04/20/93
5,203,824                       07/763,826                       04/20/93
5,203,825                       07/711,844                       04/20/93
5,203,828                       07/706,855                       04/20/93
5,203,833                       07/851,314                       04/20/93
5,203,837                       07/782,590                       04/20/93
5,203,838                       07/745,235                       04/20/93
5,203,841                       07/169,198                       04/20/93
5,203,855                       07/812,514                       04/20/93
5,203,857                       07/775,866                       04/20/93
5,203,861                       07/809,869                       04/20/93
5,203,868                       07/774,973                       04/20/93
5,203,875                       07/860,543                       04/20/93
5,203,887                       07/804,752                       04/20/93
5,203,888                       07/839,846                       04/20/93
5,203,891                       07/862,709                       04/20/93
5,203,892                       07/916,274                       04/20/93
5,203,894                       07/863,245                       04/20/93
5,203,904                       07/745,713                       04/20/93
5,203,915                       07/855,678                       04/20/93
5,203,917                       07/803,573                       04/20/93
5,203,921                       07/643,447                       04/20/93
5,203,932                       07/669,380                       04/20/93
5,203,933                       07/625,966                       04/20/93
5,203,940                       07/796,498                       04/20/93
5,203,943                       07/626,826                       04/20/93
5,203,944                       07/774,610                       04/20/93
5,203,948                       07/760,735                       04/20/93
5,203,949                       07/643,733                       04/20/93
5,203,964                       07/815,896                       04/20/93
5,203,965                       07/657,358                       04/20/93
5,203,966                       07/834,860                       04/20/93
5,203,969                       07/772,932                       04/20/93
5,203,971                       07/788,919                       04/20/93
5,203,972                       07/798,645                       04/20/93
5,203,973                       07/875,546                       04/20/93
5,203,975                       07/784,241                       04/20/93
5,203,979                       07/776,233                       04/20/93
5,203,980                       07/782,151                       04/20/93
5,203,996                       07/803,674                       04/20/93
5,204,000                       07/829,755                       04/20/93
5,204,008                       07/858,001                       04/20/93
5,204,011                       07/894,490                       04/20/93
5,204,016                       07/367,022                       04/20/93
5,204,018                       07/643,965                       04/20/93
5,204,020                       07/875,609                       04/20/93
5,204,024                       07/888,379                       04/20/93
5,204,025                       07/681,899                       04/20/93
5,204,031                       07/827,537                       04/20/93
5,204,044                       07/662,998                       04/20/93
5,204,056                       07/923,214                       04/20/93
5,204,059                       07/804,486                       04/20/93
5,204,069                       07/772,155                       04/20/93
5,204,070                       07/770,858                       04/20/93
5,204,071                       07/620,810                       04/20/93
5,204,073                       07/755,785                       04/20/93
5,204,074                       07/613,064                       04/20/93
5,204,077                       07/760,136                       04/20/93
5,204,079                       07/656,543                       04/20/93
5,204,080                       07/545,691                       04/20/93
5,204,088                       07/749,486                       04/20/93
5,204,107                       07/794,909                       04/20/93
5,204,124                       07/789,977                       04/20/93
5,204,127                       07/698,044                       04/20/93
5,204,133                       07/823,583                       04/20/93
5,204,139                       07/785,108                       04/20/93
5,204,140                       07/621,660                       04/20/93
5,204,146                       07/656,955                       04/20/93
5,204,154                       07/844,518                       04/20/93
5,204,157                       07/511,076                       04/20/93
5,204,175                       07/711,888                       04/20/93
5,204,176                       07/845,104                       04/20/93
5,204,178                       07/784,427                       04/20/93
5,204,202                       07/494,527                       04/20/93
5,204,231                       07/861,123                       04/20/93
5,204,233                       07/772,230                       04/20/93
5,204,235                       07/810,164                       04/20/93
5,204,243                       07/480,097                       04/20/93
5,204,246                       07/634,256                       04/20/93
5,204,251                       07/717,864                       04/20/93
5,204,289                       07/779,016                       04/20/93
5,204,292                       07/678,788                       04/20/93
5,204,295                       07/725,933                       04/20/93
5,204,299                       07/787,808                       04/20/93
5,204,300                       07/366,260                       04/20/93
5,204,302                       07/755,076                       04/20/93
5,204,315                       07/837,918                       04/20/93
5,204,317                       07/737,296                       04/20/93
5,204,319                       07/738,307                       04/20/93
5,204,321                       07/902,509                       04/20/93
5,204,323                       07/763,477                       04/20/93
5,204,329                       07/535,672                       04/20/93
5,204,334                       07/765,360                       04/20/93
5,204,337                       07/917,915                       04/20/93
5,204,343                       07/776,771                       04/20/93
5,204,355                       07/806,975                       04/20/93
5,204,372                       07/789,693                       04/20/93
5,204,380                       07/751,190                       04/20/93
5,204,381                       07/870,857                       04/20/93
5,204,384                       07/644,788                       04/20/93
5,204,395                       07/805,159                       04/20/93
5,204,396                       07/897,672                       04/20/93
5,204,402                       07/625,546                       04/20/93
5,204,408                       07/782,640                       04/20/93
5,204,412                       07/614,630                       04/20/93
5,204,420                       07/814,987                       04/20/93
5,204,426                       07/784,083                       04/20/93
5,204,430                       07/702,153                       04/20/93
5,204,431                       07/822,730                       04/20/93
5,204,436                       07/739,857                       04/20/93
5,204,450                       07/441,368                       04/20/93
5,204,465                       07/803,067                       04/20/93
5,204,467                       07/810,997                       04/20/93
5,204,471                       07/920,217                       04/20/93
5,204,472                       07/807,523                       04/20/93
5,204,474                       07/709,688                       04/20/93
5,204,484                       07/899,033                       04/20/93
5,204,486                       07/689,972                       04/20/93
5,204,489                       07/628,012                       04/20/93
5,204,498                       07/811,701                       04/20/93
5,204,508                       07/560,373                       04/20/93
5,204,513                       07/591,739                       04/20/93
5,204,514                       07/660,713                       04/20/93
5,204,520                       07/811,749                       04/20/93
5,204,526                       07/837,092                       04/20/93
5,204,528                       07/667,434                       04/20/93
5,204,529                       07/642,933                       04/20/93
5,204,551                       07/724,256                       04/20/93
5,204,558                       07/760,458                       04/20/93
5,204,560                       07/771,669                       04/20/93
5,204,563                       07/823,884                       04/20/93
5,204,568                       07/763,988                       04/20/93
5,204,570                       07/756,435                       04/20/93
5,204,574                       07/799,109                       04/20/93
5,204,580                       07/729,853                       04/20/93
5,204,584                       07/763,305                       04/20/93
5,204,586                       07/731,672                       04/20/93
5,204,596                       07/582,965                       04/20/93
5,204,598                       07/773,593                       04/20/93
5,204,607                       07/838,415                       04/20/93
5,204,613                       07/694,885                       04/20/93
5,204,617                       07/780,053                       04/20/93
5,204,618                       07/836,512                       04/20/93
5,204,625                       07/631,121                       04/20/93
5,204,627                       07/669,143                       04/20/93
5,204,632                       07/851,638                       04/20/93
5,204,646                       07/778,262                       04/20/93
5,204,650                       07/692,255                       04/20/93
5,204,657                       07/706,152                       04/20/93
5,204,671                       07/643,305                       04/20/93
5,204,672                       07/641,162                       04/20/93
5,204,680                       07/775,950                       04/20/93
5,204,682                       07/834,071                       04/20/93
5,204,685                       07/907,251                       04/20/93
5,204,700                       07/606,457                       04/20/93
5,204,706                       07/797,951                       04/20/93
5,204,715                       07/664,935                       04/20/93
5,204,732                       07/846,811                       04/20/93
5,204,745                       07/741,245                       04/20/93
5,204,746                       07/664,742                       04/20/93
5,204,751                       07/568,974                       04/20/93
5,204,755                       07/428,495                       04/20/93
5,204,757                       07/639,796                       04/20/93
5,204,760                       07/749,531                       04/20/93
5,204,770                       07/721,459                       04/20/93
5,204,775                       07/830,728                       04/20/93
5,204,783                       07/759,584                       04/20/93
5,204,784                       07/622,911                       04/20/93
5,204,800                       07/563,084                       04/20/93
5,204,809                       07/863,620                       04/20/93
5,204,810                       07/601,787                       04/20/93
5,204,812                       07/823,085                       04/20/93
5,204,823                       07/673,767                       04/20/93
5,204,843                       07/723,181                       04/20/93
5,204,849                       07/491,906                       04/20/93
5,204,855                       07/639,487                       04/20/93
5,204,856                       07/638,956                       04/20/93
5,204,863                       07/652,433                       04/20/93
5,204,865                       07/571,539                       04/20/93
5,204,866                       07/831,729                       04/20/93
5,204,872                       07/685,629                       04/20/93
5,204,877                       07/829,731                       04/20/93
5,204,886                       07/804,867                       04/20/93
5,204,896                       07/880,299                       04/20/93
5,204,900                       07/664,107                       04/20/93
5,204,904                       06/936,459                       04/20/93
5,204,907                       07/706,459                       04/20/93
5,204,908                       07/588,446                       04/20/93
5,204,911                       07/706,800                       04/20/93
5,204,912                       07/749,479                       04/20/93
5,204,919                       07/468,598                       04/20/93
5,204,926                       07/826,893                       04/20/93
5,204,933                       07/802,209                       04/20/93
5,204,934                       07/591,904                       04/20/93
5,204,935                       07/865,748                       04/20/93
5,204,939                       07/627,151                       04/20/93
5,204,943                       07/581,148                       04/20/93
5,204,944                       07/387,605                       04/20/93
5,204,948                       07/576,860                       04/20/93
5,204,955                       07/580,133                       04/20/93
5,204,957                       07/954,940                       04/20/93
5,204,959                       07/370,002                       04/20/93
5,204,980                       07/865,217                       04/20/93

                    PATENTS WHICH EXPIRED ON April 22, 2001
                    DUE TO FAILURE TO PAY MAINTENANCE FEES

Patent                            Serial                            Issue
Number                            Number                             Date

5,621,914                       08/394,615                       04/22/97
5,621,919                       08/503,034                       04/22/97
5,621,920                       08/601,185                       04/22/97
5,621,921                       08/441,093                       04/22/97
5,621,923                       08/594,682                       04/22/97
5,621,926                       08/507,675                       04/22/97
5,621,928                       08/689,596                       04/22/97
5,621,929                       08/400,135                       04/22/97
5,621,932                       08/510,925                       04/22/97
5,621,944                       08/529,804                       04/22/97
5,621,945                       08/349,943                       04/22/97
5,621,946                       08/578,484                       04/22/97
5,621,950                       08/562,549                       04/22/97
5,621,951                       08/664,670                       04/22/97
5,621,971                       08/501,694                       04/22/97
5,621,973                       08/445,579                       04/22/97
5,621,974                       08/534,483                       04/22/97
5,621,976                       08/475,636                       04/22/97
5,621,977                       08/512,069                       04/22/97
5,621,984                       08/511,625                       04/22/97
5,621,987                       08/482,414                       04/22/97
5,621,994                       08/434,245                       04/22/97
5,621,999                       08/512,682                       04/22/97
5,622,000                       08/526,219                       04/22/97
5,622,003                       08/500,660                       04/22/97
5,622,004                       08/273,732                       04/22/97
5,622,005                       08/554,056                       04/22/97
5,622,010                       08/516,616                       04/22/97
5,622,012                       08/237,837                       04/22/97
5,622,020                       08/567,270                       04/22/97
5,622,021                       08/422,063                       04/22/97
5,622,023                       08/413,952                       04/22/97
5,622,026                       08/407,206                       04/22/97
5,622,028                       08/507,005                       04/22/97
5,622,038                       08/547,253                       04/22/97
5,622,039                       08/434,021                       04/22/97
5,622,041                       08/249,913                       04/22/97
5,622,062                       08/640,402                       04/22/97
5,622,064                       08/728,667                       04/22/97
5,622,067                       08/377,923                       04/22/97
5,622,068                       08/403,741                       04/22/97
5,622,074                       08/489,389                       04/22/97
5,622,076                       08/434,602                       04/22/97
5,622,092                       08/407,290                       04/22/97
5,622,114                       08/606,753                       04/22/97
5,622,119                       08/518,304                       04/22/97
5,622,120                       08/608,754                       04/22/97
5,622,121                       08/401,275                       04/22/97
5,622,127                       08/495,790                       04/22/97
5,622,128                       08/546,265                       04/22/97
5,622,129                       08/546,266                       04/22/97
5,622,138                       08/375,480                       04/22/97
5,622,142                       08/512,670                       04/22/97
5,622,159                       08/435,643                       04/22/97
5,622,164                       08/197,365                       04/22/97
5,622,165                       08/628,775                       04/22/97
5,622,167                       08/644,106                       04/22/97
5,622,168                       08/400,273                       04/22/97
5,622,178                       08/237,669                       04/22/97
5,622,189                       08/467,609                       04/22/97
5,622,192                       08/567,703                       04/22/97
5,622,193                       08/564,485                       04/22/97
5,622,194                       08/298,143                       04/22/97
5,622,195                       08/692,976                       04/22/97
5,622,196                       08/587,373                       04/22/97
5,622,197                       08/411,962                       04/22/97
5,622,203                       08/538,586                       04/22/97
5,622,205                       08/528,134                       04/22/97
5,622,231                       08/492,388                       04/22/97
5,622,235                       08/447,822                       04/22/97
5,622,241                       08/527,244                       04/22/97
5,622,242                       08/263,773                       04/22/97
5,622,248                       08/517,703                       04/22/97
5,622,249                       08/411,801                       04/22/97
5,622,254                       08/633,264                       04/22/97
5,622,255                       08/397,505                       04/22/97
5,622,256                       08/493,006                       04/22/97
5,622,259                       08/473,681                       04/22/97
5,622,260                       08/052,129                       04/22/97
5,622,264                       08/585,382                       04/22/97
5,622,272                       08/382,597                       04/22/97
5,622,273                       08/528,714                       04/22/97
5,622,274                       08/456,773                       04/22/97
5,622,277                       08/666,585                       04/22/97
5,622,278                       08/558,396                       04/22/97
5,622,281                       08/488,783                       04/22/97
5,622,284                       08/627,990                       04/22/97
5,622,287                       08/511,917                       04/22/97
5,622,290                       08/421,786                       04/22/97
5,622,291                       08/469,910                       04/22/97
5,622,292                       08/438,046                       04/22/97
5,622,294                       08/506,355                       04/22/97
5,622,307                       08/513,352                       04/22/97
5,622,313                       08/398,376                       04/22/97
5,622,314                       08/411,109                       04/22/97
5,622,317                       08/363,512                       04/22/97
5,622,321                       08/496,885                       04/22/97
5,622,333                       08/582,273                       04/22/97
5,622,340                       08/566,835                       04/22/97
5,622,343                       08/420,475                       04/22/97
5,622,346                       08/297,137                       04/22/97
5,622,349                       08/352,917                       04/22/97
5,622,352                       08/622,435                       04/22/97
5,622,361                       08/428,491                       04/22/97
5,622,367                       08/547,726                       04/22/97
5,622,368                       08/600,734                       04/22/97
5,622,370                       08/672,934                       04/22/97
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