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 February 28, 2001
                    DUE TO FAILURE TO PAY MAINTENANCE FEES

Patent                            Serial                            Issue
Number                            Number                             Date

4,807,314                       07/113,945                       02/28/89
4,807,332                       07/060,930                       02/28/89
4,807,338                       07/141,549                       02/28/89
4,807,354                       07/151,546                       02/28/89
4,807,357                       07/043,940                       02/28/89
4,807,358                       07/074,647                       02/28/89
4,807,364                       07/034,592                       02/28/89
4,807,367                       07/061,454                       02/28/89
4,807,387                       07/161,854                       02/28/89
4,807,390                       07/164,094                       02/28/89
4,807,403                       07/167,843                       02/28/89
4,807,411                       07/181,682                       02/28/89
4,807,414                       07/104,089                       02/28/89
4,807,415                       07/193,169                       02/28/89
4,807,437                       07/168,641                       02/28/89
4,807,438                       07/014,539                       02/28/89
4,807,440                       07/109,538                       02/28/89
4,807,444                       07/104,214                       02/28/89
4,807,445                       07/124,865                       02/28/89
4,807,450                       07/202,195                       02/28/89
4,807,452                       07/174,182                       02/28/89
4,807,474                       07/132,626                       02/28/89
4,807,475                       07/092,065                       02/28/89
4,807,481                       07/031,902                       02/28/89
4,807,482                       07/051,440                       02/28/89
4,807,488                       07/092,815                       02/28/89
4,807,498                       06/921,650                       02/28/89
4,807,504                       07/089,672                       02/28/89
4,807,513                       06/468,169                       02/28/89
4,807,520                       06/656,285                       02/28/89
4,807,521                       07/125,489                       02/28/89
4,807,532                       07/096,631                       02/28/89
4,807,534                       07/092,056                       02/28/89
4,807,539                       07/189,017                       02/28/89
4,807,542                       07/123,044                       02/28/89
4,807,559                       07/092,181                       02/28/89
4,807,570                       07/100,736                       02/28/89
4,807,584                       07/120,185                       02/28/89
4,807,585                       07/014,940                       02/28/89
4,807,586                       07/059,912                       02/28/89
4,807,599                       07/047,645                       02/28/89
4,807,603                       07/051,378                       02/28/89
4,807,630                       07/107,282                       02/28/89
4,807,631                       07/107,138                       02/28/89
4,807,636                       06/905,742                       02/28/89
4,807,638                       07/111,699                       02/28/89
4,807,643                       06/408,193                       02/28/89
4,807,661                       07/128,729                       02/28/89
4,807,664                       07/113,453                       02/28/89
4,807,669                       07/013,679                       02/28/89
4,807,673                       07/098,468                       02/28/89
4,807,689                       07/013,299                       02/28/89
4,807,698                       07/035,097                       02/28/89
4,807,699                       07/052,500                       02/28/89
4,807,701                       07/087,372                       02/28/89
4,807,708                       07/079,780                       02/28/89
4,807,727                       07/099,284                       02/28/89
4,807,728                       07/026,750                       02/28/89
4,807,739                       07/011,935                       02/28/89
4,807,752                       06/819,906                       02/28/89
4,807,756                       07/030,406                       02/28/89
4,807,757                       07/081,650                       02/28/89
4,807,758                       07/138,464                       02/28/89
4,807,759                       06/846,832                       02/28/89
4,807,767                       07/043,379                       02/28/89
4,807,771                       07/095,547                       02/28/89
4,807,776                       07/093,809                       02/28/89
4,807,779                       06/889,476                       02/28/89
4,807,780                       07/077,685                       02/28/89
4,807,791                       06/838,775                       02/28/89
4,807,807                       07/048,971                       02/28/89
4,807,810                       07/059,070                       02/28/89
4,807,811                       07/095,459                       02/28/89
4,807,816                       07/222,399                       02/28/89
4,807,823                       07/171,187                       02/28/89
4,807,829                       07/157,643                       02/28/89
4,807,833                       06/850,804                       02/28/89
4,807,836                       07/168,487                       02/28/89
4,807,841                       07/171,568                       02/28/89
4,807,842                       07/103,619                       02/28/89
4,807,859                       07/185,402                       02/28/89
4,807,865                       07/056,857                       02/28/89
4,807,866                       06/943,520                       02/28/89
4,807,871                       07/071,856                       02/28/89
4,807,893                       07/170,893                       02/28/89
4,807,905                       07/118,440                       02/28/89
4,807,918                       07/168,915                       02/28/89
4,807,920                       07/043,583                       02/28/89
4,807,925                       07/013,568                       02/28/89
4,807,936                       07/095,358                       02/28/89
4,807,943                       07/130,562                       02/28/89
4,807,957                       07/108,760                       02/28/89
4,807,962                       07/065,689                       02/28/89
4,807,969                       07/044,210                       02/28/89
4,807,976                       07/033,319                       02/28/89
4,807,980                       07/142,524                       02/28/89
4,807,989                       07/001,585                       02/28/89
4,807,991                       06/848,606                       02/28/89
4,807,995                       06/882,229                       02/28/89
4,807,996                       07/072,387                       02/28/89
4,808,003                       06/929,234                       02/28/89
4,808,004                       07/190,701                       02/28/89
4,808,015                       07/106,509                       02/28/89
4,808,025                       07/088,088                       02/28/89
4,808,029                       07/053,069                       02/28/89
4,808,032                       07/055,217                       02/28/89
4,808,036                       07/148,176                       02/28/89
4,808,040                       07/110,743                       02/28/89
4,808,041                       07/110,741                       02/28/89
4,808,056                       07/151,478                       02/28/89
4,808,059                       06/886,296                       02/28/89
4,808,060                       06/509,312                       02/28/89
4,808,067                       07/153,678                       02/28/89
4,808,073                       07/120,990                       02/28/89
4,808,076                       07/133,093                       02/28/89
4,808,081                       07/022,480                       02/28/89
4,808,083                       07/150,395                       02/28/89
4,808,085                       06/855,599                       02/28/89
4,808,092                       07/000,840                       02/28/89
4,808,097                       07/005,704                       02/28/89
4,808,104                       07/117,577                       02/28/89
4,808,105                       07/154,360                       02/28/89
4,808,113                       07/149,313                       02/28/89
4,808,119                       07/148,070                       02/28/89
4,808,129                       07/154,262                       02/28/89
4,808,156                       07/023,812                       02/28/89
4,808,157                       07/072,428                       02/28/89
4,808,160                       06/927,525                       02/28/89
4,808,175                       07/078,586                       02/28/89
4,808,176                       06/947,942                       02/28/89
4,808,190                       07/004,497                       02/28/89
4,808,193                       07/198,991                       02/28/89
4,808,196                       07/201,241                       02/28/89
4,808,205                       07/121,424                       02/28/89
4,808,216                       07/184,280                       02/28/89
4,808,219                       07/059,727                       02/28/89
4,808,223                       07/070,577                       02/28/89
4,808,224                       07/099,321                       02/28/89
4,808,230                       07/202,856                       02/28/89
4,808,232                       06/938,821                       02/28/89
4,808,235                       07/144,282                       02/28/89
4,808,240                       07/095,384                       02/28/89
4,808,260                       07/152,718                       02/28/89
4,808,263                       07/177,568                       02/28/89
4,808,271                       06/897,554                       02/28/89
4,808,278                       07/144,216                       02/28/89
4,808,279                       06/914,260                       02/28/89
4,808,281                       07/212,352                       02/28/89
4,808,283                       07/177,999                       02/28/89
4,808,284                       07/149,777                       02/28/89
4,808,287                       07/136,406                       02/28/89
4,808,292                       06/923,725                       02/28/89
4,808,300                       07/014,726                       02/28/89
4,808,304                       07/166,757                       02/28/89
4,808,313                       07/001,727                       02/28/89
4,808,335                       07/115,330                       02/28/89
4,808,343                       07/120,859                       02/28/89
4,808,344                       07/154,666                       02/28/89
4,808,346                       07/014,927                       02/28/89
4,808,348                       07/049,569                       02/28/89
4,808,349                       07/155,607                       02/28/89
4,808,357                       07/121,197                       02/28/89
4,808,365                       07/199,214                       02/28/89
4,808,374                       06/945,241                       02/28/89
4,808,378                       07/037,117                       02/28/89
4,808,385                       07/015,906                       02/28/89
4,808,388                       07/086,565                       02/28/89
4,808,396                       07/086,784                       02/28/89
4,808,399                       06/940,300                       02/28/89
4,808,407                       07/085,453                       02/28/89
4,808,410                       07/133,834                       02/28/89
4,808,415                       07/195,582                       02/28/89
4,808,421                       07/017,841                       02/28/89
4,808,423                       06/925,281                       02/28/89
4,808,426                       06/855,127                       02/28/89
4,808,433                       06/907,549                       02/28/89
4,808,448                       06/807,811                       02/28/89
4,808,451                       07/046,836                       02/28/89
4,808,454                       06/908,108                       02/28/89
4,808,464                       07/186,263                       02/28/89
4,808,475                       07/012,840                       02/28/89
4,808,480                       06/934,766                       02/28/89
4,808,485                       07/152,780                       02/28/89
4,808,492                       07/130,185                       02/28/89
4,808,498                       07/136,007                       02/28/89
4,808,503                       07/110,757                       02/28/89
4,808,506                       07/086,333                       02/28/89
4,808,507                       07/090,284                       02/28/89
4,808,516                       07/076,095                       02/28/89
4,808,521                       06/821,428                       02/28/89
4,808,531                       06/756,380                       02/28/89
4,808,533                       06/730,042                       02/28/89
4,808,558                       07/089,376                       02/28/89
4,808,560                       06/814,090                       02/28/89
4,808,572                       06/936,671                       02/28/89
4,808,577                       07/061,377                       02/28/89
4,808,587                       07/035,798                       02/28/89
4,808,600                       07/193,621                       02/28/89
4,808,608                       07/076,424                       02/28/89
4,808,612                       07/047,970                       02/28/89
4,808,618                       07/035,797                       02/28/89
4,808,625                       07/090,578                       02/28/89
4,808,632                       07/079,352                       02/28/89
4,808,638                       07/099,676                       02/28/89
4,808,645                       07/180,662                       02/28/89
4,808,650                       07/168,054                       02/28/89
4,808,655                       07/090,450                       02/28/89
4,808,664                       07/132,449                       02/28/89
4,808,668                       06/921,825                       02/28/89
4,808,690                       07/161,801                       02/28/89
4,808,693                       06/875,122                       02/28/89
4,808,697                       07/164,161                       02/28/89
4,808,704                       06/868,872                       02/28/89
4,808,705                       06/944,347                       02/28/89
4,808,715                       07/141,178                       02/28/89
4,808,723                       06/567,480                       02/28/89
4,808,730                       07/065,441                       02/28/89
4,808,732                       07/115,544                       02/28/89
4,808,736                       07/083,764                       02/28/89
4,808,746                       07/129,309                       02/28/89
4,808,753                       07/146,221                       02/28/89
4,808,755                       07/137,268                       02/28/89
4,808,757                       07/193,956                       02/28/89
4,808,758                       07/125,596                       02/28/89
4,808,759                       07/081,798                       02/28/89
4,808,762                       07/094,617                       02/28/89
4,808,778                       07/085,292                       02/28/89
4,808,782                       07/122,788                       02/28/89
4,808,787                       07/122,046                       02/28/89
4,808,798                       07/085,341                       02/28/89
4,808,820                       07/099,935                       02/28/89
4,808,833                       06/941,079                       02/28/89
4,808,845                       06/937,051                       02/28/89
4,808,852                       07/127,567                       02/28/89
4,808,856                       07/097,612                       02/28/89
4,808,864                       07/098,835                       02/28/89
4,808,866                       07/082,590                       02/28/89
4,808,872                       07/173,864                       02/28/89
4,808,879                       07/058,725                       02/28/89
4,808,880                       06/905,345                       02/28/89
4,808,888                       06/936,218                       02/28/89
4,808,897                       06/836,523                       02/28/89
4,808,906                       07/182,272                       02/28/89
4,808,912                       06/948,055                       02/28/89
4,808,919                       07/135,232                       02/28/89
4,808,930                       06/903,388                       02/28/89
4,808,931                       07/037,817                       02/28/89
4,808,933                       07/013,545                       02/28/89
4,808,938                       07/120,440                       02/28/89
4,808,946                       06/945,650                       02/28/89
4,808,966                       07/081,957                       02/28/89
4,808,972                       07/055,151                       02/28/89
4,808,979                       07/033,291                       02/28/89
4,808,980                       07/112,199                       02/28/89
4,808,982                       06/892,686                       02/28/89
4,808,983                       06/691,887                       02/28/89
4,808,988                       06/600,106                       02/28/89
4,808,997                       07/053,151                       02/28/89
4,808,998                       07/090,544                       02/28/89
4,809,007                       07/020,851                       02/28/89
4,809,010                       06/393,044                       02/28/89
4,809,012                       07/054,758                       02/28/89
4,809,019                       07/065,106                       02/28/89
4,809,026                       06/890,305                       02/28/89
4,809,027                       06/890,304                       02/28/89
4,809,039                       07/123,322                       02/28/89
4,809,052                       06/860,413                       02/28/89
4,809,058                       06/941,812                       02/28/89
4,809,059                       06/944,464                       02/28/89
4,809,066                       07/083,022                       02/28/89
4,809,067                       07/053,627                       02/28/89
4,809,069                       07/166,279                       02/28/89
4,809,071                       06/941,641                       02/28/89
4,809,078                       06/655,509                       02/28/89
4,809,079                       07/208,101                       02/28/89
4,809,082                       07/089,331                       02/28/89
4,809,087                       07/124,434                       02/28/89
4,809,090                       07/222,376                       02/28/89
4,809,092                       07/070,199                       02/28/89
4,809,096                       07/006,121                       02/28/89
4,809,098                       06/846,956                       02/28/89
4,809,109                       07/173,496                       02/28/89
4,809,120                       06/929,348                       02/28/89
4,809,123                       06/851,740                       02/28/89
4,809,129                       07/117,305                       02/28/89
4,809,139                       07/078,600                       02/28/89
4,809,140                       07/113,920                       02/28/89
4,809,144                       07/127,807                       02/28/89
4,809,147                       07/186,777                       02/28/89
4,809,154                       06/884,122                       02/28/89
4,809,159                       07/147,128                       02/28/89
4,809,173                       07/055,390                       02/28/89
4,809,180                       07/040,900                       02/28/89
4,809,182                       06/945,562                       02/28/89
4,809,197                       06/945,953                       02/28/89
4,809,202                       06/814,348                       02/28/89
4,809,205                       06/934,228                       02/28/89
4,809,220                       07/029,359                       02/28/89
4,809,226                       07/113,695                       02/28/89
4,809,237                       07/103,459                       02/28/89
4,809,258                       06/944,699                       02/28/89
4,809,263                       07/021,320                       02/28/89
4,809,265                       07/044,964                       02/28/89
4,809,266                       06/833,606                       02/28/89
4,809,267                       07/067,231                       02/28/89
4,809,272                       06/909,549                       02/28/89
4,809,277                       07/106,681                       02/28/89
4,809,282                       07/125,801                       02/28/89
4,809,286                       07/205,012                       02/28/89
4,809,288                       07/021,640                       02/28/89
4,809,292                       07/051,466                       02/28/89
4,809,298                       07/053,396                       02/28/89
4,809,300                       07/177,638                       02/28/89
4,809,318                       07/101,917                       02/28/89
4,809,324                       07/078,447                       02/28/89
4,809,328                       07/157,048                       02/28/89
4,809,330                       06/726,583                       02/28/89
4,809,337                       06/877,225                       02/28/89
4,809,348                       06/894,123                       02/28/89
4,809,352                       07/125,872                       02/28/89
4,809,359                       06/945,822                       02/28/89
4,809,361                       06/929,797                       02/28/89

                  PATENTS WHICH EXPIRED ON February 23, 2001
                    DUE TO FAILURE TO PAY MAINTENANCE FEES

Patent                            Serial                            Issue
Number                            Number                             Date

5,187,813                       07/523,478                       02/23/93
5,187,814                       07/731,431                       02/23/93
5,187,820                       07/848,857                       02/23/93
5,187,823                       07/917,302                       02/23/93
5,187,826                       07/840,407                       02/23/93
5,187,827                       07/657,394                       02/23/93
5,187,833                       07/807,234                       02/23/93
5,187,835                       07/705,546                       02/23/93
5,187,850                       07/892,711                       02/23/93
5,187,857                       07/859,584                       02/23/93
5,187,863                       07/857,524                       02/23/93
5,187,873                       07/827,348                       02/23/93
5,187,875                       07/854,849                       02/23/93
5,187,878                       07/919,291                       02/23/93
5,187,879                       07/874,541                       02/23/93
5,187,883                       07/565,347                       02/23/93
5,187,884                       07/673,930                       02/23/93
5,187,890                       07/820,078                       02/23/93
5,187,893                       07/652,138                       02/23/93
5,187,897                       07/848,385                       02/23/93
5,187,901                       07/473,894                       02/23/93
5,187,908                       07/602,424                       02/23/93
5,187,912                       07/787,393                       02/23/93
5,187,916                       07/714,149                       02/23/93
5,187,925                       07/715,173                       02/23/93
5,187,927                       07/879,184                       02/23/93
5,187,928                       07/906,060                       02/23/93
5,187,931                       07/422,165                       02/23/93
5,187,932                       07/615,052                       02/23/93
5,187,934                       07/758,882                       02/23/93
5,187,935                       07/839,063                       02/23/93
5,187,940                       07/657,138                       02/23/93
5,187,945                       07/699,002                       02/23/93
5,187,946                       07/765,920                       02/23/93
5,187,949                       07/736,787                       02/23/93
5,187,951                       07/725,792                       02/23/93
5,187,955                       07/763,279                       02/23/93
5,187,957                       07/879,337                       02/23/93
5,187,960                       07/768,806                       02/23/93
5,187,963                       07/897,885                       02/23/93
5,187,965                       07/714,277                       02/23/93
5,187,976                       07/746,375                       02/23/93
5,187,979                       07/692,295                       02/23/93
5,187,980                       07/531,492                       02/23/93
5,187,981                       07/667,858                       02/23/93
5,187,982                       07/691,990                       02/23/93
5,187,983                       07/754,894                       02/23/93
5,187,996                       07/768,757                       02/23/93
5,187,999                       07/906,721                       02/23/93
5,188,003                       07/816,220                       02/23/93
5,188,016                       07/857,157                       02/23/93
5,188,035                       07/884,002                       02/23/93
5,188,039                       07/752,014                       02/23/93
5,188,040                       07/441,998                       02/23/93
5,188,048                       07/799,176                       02/23/93
5,188,049                       07/820,991                       02/23/93
5,188,050                       07/779,782                       02/23/93
5,188,053                       07/564,067                       02/23/93
5,188,054                       07/797,394                       02/23/93
5,188,058                       07/902,661                       02/23/93
5,188,062                       07/863,189                       02/23/93
5,188,067                       07/905,692                       02/23/93
5,188,069                       07/791,978                       02/23/93
5,188,070                       07/757,000                       02/23/93
5,188,071                       07/826,122                       02/23/93
5,188,076                       07/883,003                       02/23/93
5,188,077                       07/784,132                       02/23/93
5,188,086                       07/863,804                       02/23/93
5,188,094                       07/769,120                       02/23/93
5,188,096                       07/666,513                       02/23/93
5,188,097                       07/731,065                       02/23/93
5,188,099                       07/537,960                       02/23/93
5,188,100                       07/756,681                       02/23/93
5,188,109                       07/707,134                       02/23/93
5,188,110                       07/646,930                       02/23/93
5,188,114                       07/606,808                       02/23/93
5,188,122                       07/540,614                       02/23/93
5,188,132                       07/912,481                       02/23/93
5,188,134                       07/757,397                       02/23/93
5,188,138                       07/728,175                       02/23/93
5,188,143                       07/848,078                       02/23/93
5,188,144                       07/751,525                       02/23/93
5,188,147                       07/611,499                       02/23/93
5,188,149                       07/711,083                       02/23/93
5,188,151                       07/781,326                       02/23/93
5,188,153                       07/766,597                       02/23/93
5,188,154                       07/848,801                       02/23/93
5,188,161                       07/719,914                       02/23/93
5,188,162                       07/810,643                       02/23/93
5,188,165                       07/623,758                       02/23/93
5,188,169                       07/828,121                       02/23/93
5,188,172                       07/752,706                       02/23/93
5,188,178                       07/738,755                       02/23/93
5,188,179                       07/813,195                       02/23/93
5,188,187                       07/754,456                       02/23/93
5,188,190                       07/752,308                       02/23/93
5,188,192                       07/582,976                       02/23/93
5,188,194                       07/700,528                       02/23/93
5,188,203                       07/588,229                       02/23/93
5,188,207                       07/811,718                       02/23/93
5,188,219                       07/896,572                       02/23/93
5,188,221                       07/851,519                       02/23/93
5,188,223                       07/850,403                       02/23/93
5,188,227                       07/786,938                       02/23/93
5,188,228                       07/799,715                       02/23/93
5,188,229                       07/680,962                       02/23/93
5,188,232                       07/748,533                       02/23/93
5,188,233                       07/573,936                       02/23/93
5,188,234                       07/847,538                       02/23/93
5,188,241                       07/781,917                       02/23/93
5,188,242                       07/786,545                       02/23/93
5,188,244                       07/851,571                       02/23/93
5,188,252                       07/899,922                       02/23/93
5,188,256                       07/562,518                       02/23/93
5,188,259                       07/649,498                       02/23/93
5,188,274                       07/850,688                       02/23/93
5,188,277                       07/851,214                       02/23/93
5,188,278                       07/710,199                       02/23/93
5,188,279                       07/745,643                       02/23/93
5,188,281                       07/701,827                       02/23/93
5,188,283                       07/823,778                       02/23/93
5,188,286                       07/809,351                       02/23/93
5,188,290                       07/654,342                       02/23/93
5,188,291                       07/529,886                       02/23/93
5,188,296                       07/679,495                       02/23/93
5,188,298                       07/785,029                       02/23/93
5,188,309                       07/690,626                       02/23/93
5,188,322                       07/782,102                       02/23/93
5,188,337                       07/788,981                       02/23/93
5,188,358                       07/782,398                       02/23/93
5,188,360                       07/574,593                       02/23/93
5,188,373                       07/577,085                       02/23/93
5,188,379                       07/600,759                       02/23/93
5,188,387                       07/591,814                       02/23/93
5,188,392                       07/841,187                       02/23/93
5,188,394                       07/737,490                       02/23/93
5,188,399                       07/636,234                       02/23/93
5,188,400                       07/761,271                       02/23/93
5,188,403                       07/692,205                       02/23/93
5,188,406                       07/822,467                       02/23/93
5,188,408                       07/741,809                       02/23/93
5,188,410                       07/804,299                       02/23/93
5,188,414                       07/812,545                       02/23/93
5,188,415                       07/867,780                       02/23/93
5,188,416                       07/871,398                       02/23/93
5,188,423                       07/748,539                       02/23/93
5,188,424                       07/819,290                       02/23/93
5,188,425                       07/680,178                       02/23/93
5,188,430                       07/813,096                       02/23/93
5,188,431                       07/639,868                       02/23/93
5,188,438                       07/803,000                       02/23/93
5,188,441                       07/723,331                       02/23/93
5,188,450                       07/764,639                       02/23/93
5,188,455                       07/612,644                       02/23/93
5,188,456                       07/800,292                       02/23/93
5,188,463                       07/671,780                       02/23/93
5,188,467                       07/713,211                       02/23/93
5,188,468                       07/481,327                       02/23/93
5,188,470                       07/752,027                       02/23/93
5,188,481                       07/734,363                       02/23/93
5,188,485                       07/717,239                       02/23/93
5,188,486                       07/882,074                       02/23/93
5,188,488                       07/911,810                       02/23/93
5,188,493                       07/742,619                       02/23/93
5,188,496                       07/912,478                       02/23/93
5,188,497                       07/634,147                       02/23/93
5,188,500                       07/717,475                       02/23/93
5,188,501                       07/692,289                       02/23/93
5,188,506                       07/750,991                       02/23/93
5,188,511                       07/750,389                       02/23/93
5,188,513                       07/908,770                       02/23/93
5,188,515                       07/709,648                       02/23/93
5,188,525                       07/816,769                       02/23/93
5,188,529                       07/698,272                       02/23/93
5,188,532                       07/850,240                       02/23/93
5,188,537                       07/889,468                       02/23/93
5,188,540                       07/852,950                       02/23/93
5,188,541                       07/804,573                       02/23/93
5,188,543                       07/745,176                       02/23/93
5,188,546                       07/841,927                       02/23/93
5,188,547                       07/879,637                       02/23/93
5,188,551                       07/724,122                       02/23/93
5,188,554                       07/453,337                       02/23/93
5,188,562                       07/815,830                       02/23/93
5,188,565                       07/683,861                       02/23/93
5,188,569                       07/843,429                       02/23/93
5,188,574                       07/712,887                       02/23/93
5,188,576                       07/819,909                       02/23/93
5,188,577                       07/913,607                       02/23/93
5,188,580                       07/389,757                       02/23/93
5,188,592                       07/719,479                       02/23/93
5,188,604                       07/518,033                       02/23/93
5,188,607                       07/791,482                       02/23/93
5,188,608                       07/862,464                       02/23/93
5,188,609                       07/726,947                       02/23/93
5,188,615                       07/741,780                       02/23/93
5,188,619                       07/690,848                       02/23/93
5,188,622                       07/749,138                       02/23/93
5,188,629                       07/717,593                       02/23/93
5,188,663                       07/760,319                       02/23/93
5,188,666                       07/425,342                       02/23/93
5,188,677                       07/719,331                       02/23/93
5,188,678                       07/855,151                       02/23/93
5,188,684                       07/683,159                       02/23/93
5,188,692                       07/608,850                       02/23/93
5,188,693                       07/725,924                       02/23/93
5,188,694                       07/759,647                       02/23/93
5,188,697                       07/789,807                       02/23/93
5,188,698                       07/859,096                       02/23/93
5,188,700                       07/654,526                       02/23/93
5,188,707                       07/818,429                       02/23/93
5,188,713                       07/665,016                       02/23/93
5,188,721                       07/457,920                       02/23/93
5,188,726                       07/679,060                       02/23/93
5,188,729                       07/755,697                       02/23/93
5,188,730                       07/695,811                       02/23/93
5,188,732                       07/832,308                       02/23/93
5,188,736                       07/750,311                       02/23/93
5,188,738                       07/615,437                       02/23/93
5,188,752                       07/688,794                       02/23/93
5,188,756                       07/741,554                       02/23/93
5,188,757                       07/598,372                       02/23/93
5,188,775                       07/759,185                       02/23/93
5,188,781                       07/772,595                       02/23/93
5,188,782                       07/596,543                       02/23/93
5,188,794                       07/613,622                       02/23/93
5,188,811                       07/841,947                       02/23/93
5,188,817                       07/575,854                       02/23/93
5,188,823                       07/651,960                       02/23/93
5,188,824                       07/763,791                       02/23/93
5,188,829                       07/340,007                       02/23/93
5,188,842                       07/367,069                       02/23/93
5,188,848                       07/581,519                       02/23/93
5,188,854                       07/762,868                       02/23/93
5,188,862                       07/587,130                       02/23/93
5,188,863                       07/628,889                       02/23/93
5,188,864                       07/679,365                       02/23/93
5,188,866                       07/791,390                       02/23/93
5,188,878                       07/876,814                       02/23/93
5,188,891                       07/719,072                       02/23/93
5,188,893                       07/554,778                       02/23/93
5,188,896                       07/569,678                       02/23/93
5,188,900                       07/862,384                       02/23/93
5,188,901                       07/436,550                       02/23/93
5,188,903                       07/737,627                       02/23/93
5,188,904                       07/663,514                       02/23/93
5,188,905                       07/642,541                       02/23/93
5,188,911                       07/659,647                       02/23/93
5,188,913                       07/857,490                       02/23/93
5,188,920                       07/712,729                       02/23/93
5,188,921                       07/711,351                       02/23/93
5,188,922                       07/703,056                       02/23/93
5,188,924                       07/777,449                       02/23/93
5,188,929                       07/673,375                       02/23/93
5,188,933                       07/709,790                       02/23/93
5,188,936                       07/641,346                       02/23/93
5,188,942                       07/594,071                       02/23/93
5,188,944                       07/762,183                       02/23/93
5,188,945                       07/756,634                       02/23/93
5,188,947                       07/512,108                       02/23/93
5,188,950                       07/845,520                       02/23/93
5,188,959                       07/525,512                       02/23/93
5,188,964                       07/509,377                       02/23/93
5,188,967                       07/662,992                       02/23/93
5,188,972                       07/875,239                       02/23/93
5,188,988                       07/618,150                       02/23/93
5,188,989                       07/127,268                       02/23/93
5,188,992                       07/762,361                       02/23/93
5,189,005                       07/863,118                       02/23/93
5,189,026                       07/711,759                       02/23/93
5,189,031                       07/831,434                       02/23/93
5,189,036                       07/540,980                       02/23/93
5,189,039                       07/701,575                       02/23/93
5,189,050                       07/709,676                       02/23/93
5,189,051                       07/822,152                       02/23/93
5,189,060                       07/621,157                       02/23/93
5,189,062                       07/827,514                       02/23/93
5,189,063                       07/570,099                       02/23/93
5,189,065                       07/752,467                       02/23/93
5,189,067                       07/683,899                       02/23/93
5,189,069                       07/726,288                       02/23/93
5,189,074                       07/809,692                       02/23/93
5,189,077                       07/737,183                       02/23/93
5,189,085                       07/771,200                       02/23/93
5,189,098                       07/590,725                       02/23/93
5,189,099                       07/699,527                       02/23/93
5,189,103                       07/665,958                       02/23/93
5,189,115                       07/613,401                       02/23/93
5,189,117                       07/562,772                       02/23/93
5,189,119                       07/780,835                       02/23/93
5,189,120                       07/605,002                       02/23/93
5,189,121                       07/411,811                       02/23/93
5,189,124                       07/801,584                       02/23/93
5,189,127                       07/801,867                       02/23/93
5,189,129                       07/801,868                       02/23/93
5,189,131                       07/691,901                       02/23/93
5,189,132                       07/759,035                       02/23/93
5,189,152                       07/730,169                       02/23/93
5,189,158                       07/672,496                       02/23/93
5,189,159                       07/859,263                       02/23/93
5,189,160                       07/690,758                       02/23/93
5,189,161                       07/663,352                       02/23/93
5,189,172                       07/893,021                       02/23/93
5,189,174                       07/763,782                       02/23/93
5,189,175                       07/694,695                       02/23/93
5,189,181                       07/817,615                       02/23/93
5,189,183                       07/598,061                       02/23/93
5,189,184                       07/736,766                       02/23/93
5,189,188                       07/607,192                       02/23/93
5,189,190                       07/570,097                       02/23/93
5,189,194                       07/909,329                       02/23/93
5,189,197                       07/485,550                       02/23/93
5,189,198                       07/696,053                       02/23/93
5,189,200                       07/631,808                       02/23/93
5,189,204                       07/720,747                       02/23/93
5,189,210                       07/876,651                       02/23/93
5,189,221                       07/617,339                       02/23/93
5,189,227                       07/575,458                       02/23/93
5,189,230                       07/806,494                       02/23/93
5,189,234                       07/785,550                       02/23/93
5,189,242                       07/703,370                       02/23/93
5,189,245                       07/816,005                       02/23/93
5,189,249                       07/790,865                       02/23/93
5,189,251                       07/931,477                       02/23/93
5,189,257                       07/665,556                       02/23/93
5,189,260                       07/651,551                       02/23/93
5,189,263                       07/833,231                       02/23/93
5,189,266                       07/531,225                       02/23/93
5,189,267                       07/708,247                       02/23/93
5,189,270                       07/735,889                       02/23/93
5,189,273                       07/767,882                       02/23/93
5,189,275                       07/409,850                       02/23/93
5,189,282                       07/744,899                       02/23/93
5,189,286                       07/793,963                       02/23/93
5,189,300                       07/783,401                       02/23/93
5,189,313                       07/841,761                       02/23/93
5,189,314                       07/754,795                       02/23/93
5,189,321                       07/766,890                       02/23/93
5,189,326                       07/807,254                       02/23/93
5,189,328                       07/884,739                       02/23/93
5,189,329                       07/689,951                       02/23/93
5,189,330                       07/764,053                       02/23/93
5,189,338                       07/818,282                       02/23/93
5,189,339                       07/577,492                       02/23/93
5,189,340                       07/888,460                       02/23/93
5,189,343                       07/750,530                       02/23/93
5,189,344                       07/695,257                       02/23/93
5,189,360                       07/335,791                       02/23/93
5,189,361                       07/735,813                       02/23/93
5,189,363                       07/583,261                       02/23/93
5,189,365                       07/772,412                       02/23/93
5,189,366                       07/454,731                       02/23/93
5,189,375                       07/710,200                       02/23/93
5,189,376                       07/629,725                       02/23/93
5,189,383                       07/754,521                       02/23/93
5,189,388                       07/663,617                       02/23/93
5,189,392                       07/719,636                       02/23/93
5,189,400                       07/826,185                       02/23/93
5,189,408                       07/814,159                       02/23/93
5,189,410                       07/635,439                       02/23/93
5,189,417                       07/598,129                       02/23/93
5,189,422                       07/788,410                       02/23/93
5,189,430                       07/825,828                       02/23/93
5,189,434                       07/326,746                       02/23/93
5,189,440                       07/784,258                       02/23/93
5,189,445                       07/610,257                       02/23/93
5,189,448                       07/742,118                       02/23/93
5,189,451                       07/817,783                       02/23/93
5,189,452                       07/803,540                       02/23/93
5,189,455                       07/772,516                       02/23/93
5,189,456                       07/767,757                       02/23/93
5,189,477                       07/798,005                       02/23/93
5,189,484                       07/744,442                       02/23/93
5,189,485                       07/667,471                       02/23/93
5,189,487                       07/796,567                       02/23/93
5,189,501                       07/841,773                       02/23/93
5,189,506                       07/894,178                       02/23/93
5,189,510                       07/491,691                       02/23/93
5,189,522                       07/756,102                       02/23/93
5,189,533                       07/678,595                       02/23/93
5,189,534                       07/603,668                       02/23/93
5,189,537                       07/647,296                       02/23/93
5,189,539                       07/729,085                       02/23/93
5,189,544                       07/759,166                       02/23/93
5,189,550                       07/787,302                       02/23/93
5,189,552                       07/753,910                       02/23/93
5,189,554                       07/771,378                       02/23/93
5,189,585                       07/544,217                       02/23/93
5,189,589                       07/477,253                       02/23/93
5,189,592                       07/811,636                       02/23/93
5,189,593                       07/787,278                       02/23/93
5,189,597                       07/788,188                       02/23/93
5,189,600                       07/810,247                       02/23/93
5,189,606                       07/702,345                       02/23/93
5,189,609                       07/721,961                       02/23/93
5,189,612                       07/759,753                       02/23/93
5,189,618                       07/908,879                       02/23/93
5,189,625                       07/509,340                       02/23/93
5,189,638                       07/912,117                       02/23/93
5,189,641                       07/609,096                       02/23/93
5,189,648                       07/728,402                       02/23/93
5,189,652                       07/665,835                       02/23/93
5,189,654                       07/801,619                       02/23/93
5,189,678                       06/915,197                       02/23/93
5,189,692                       07/691,819                       02/23/93
5,189,707                       07/179,983                       02/23/93
5,189,726                       07/662,746                       02/23/93
5,189,732                       07/679,132                       02/23/93

                  PATENTS WHICH EXPIRED ON February 25, 2001
                    DUE TO FAILURE TO PAY MAINTENANCE FEES

Patent                            Serial                            Issue
Number                            Number                             Date

5,604,930                       08/528,765                       02/25/97
5,604,931                       08/004,475                       02/25/97
5,604,932                       08/607,219                       02/25/97
5,604,935                       08/372,743                       02/25/97
5,604,936                       08/535,640                       02/25/97
5,604,944                       08/541,957                       02/25/97
5,604,946                       08/202,392                       02/25/97
5,604,952                       08/587,019                       02/25/97
5,604,953                       08/507,465                       02/25/97
5,604,964                       08/613,705                       02/25/97
5,604,974                       08/241,352                       02/25/97
5,604,978                       08/455,463                       02/25/97
5,604,987                       08/386,632                       02/25/97
5,604,989                       08/418,781                       02/25/97
5,604,998                       08/313,252                       02/25/97
5,604,999                       08/525,353                       02/25/97
5,605,004                       08/554,187                       02/25/97
5,605,005                       08/548,961                       02/25/97
5,605,010                       08/560,816                       02/25/97
5,605,013                       08/373,966                       02/25/97
5,605,016                       08/494,592                       02/25/97
5,605,019                       08/231,339                       02/25/97
5,605,031                       08/596,128                       02/25/97
5,605,037                       08/511,712                       02/25/97
5,605,043                       08/462,567                       02/25/97
5,605,047                       08/465,731                       02/25/97
5,605,048                       08/433,338                       02/25/97
5,605,050                       08/629,401                       02/25/97
5,605,052                       08/418,368                       02/25/97
5,605,054                       08/629,875                       02/25/97
5,605,056                       08/533,613                       02/25/97
5,605,062                       08/499,475                       02/25/97
5,605,068                       08/443,420                       02/25/97
5,605,075                       08/455,721                       02/25/97
5,605,081                       08/567,241                       02/25/97
5,605,083                       08/419,413                       02/25/97
5,605,089                       08/543,491                       02/25/97
5,605,097                       08/427,814                       02/25/97
5,605,103                       08/526,292                       02/25/97
5,605,109                       08/422,894                       02/25/97
5,605,114                       08/420,778                       02/25/97
5,605,124                       08/554,091                       02/25/97
5,605,125                       08/383,844                       02/25/97
5,605,126                       08/596,013                       02/25/97
5,605,141                       08/221,419                       02/25/97
5,605,143                       08/509,550                       02/25/97
5,605,150                       08/334,625                       02/25/97
5,605,161                       08/265,228                       02/25/97
5,605,169                       08/662,039                       02/25/97
5,605,173                       08/344,436                       02/25/97
5,605,182                       08/425,099                       02/25/97
5,605,203                       08/520,779                       02/25/97
5,605,205                       08/289,929                       02/25/97
5,605,206                       08/513,724                       02/25/97
5,605,207                       08/437,953                       02/25/97
5,605,226                       08/387,575                       02/25/97
5,605,231                       08/391,860                       02/25/97
5,605,233                       08/380,025                       02/25/97
5,605,235                       08/366,736                       02/25/97
5,605,241                       08/373,939                       02/25/97
5,605,242                       08/563,274                       02/25/97
5,605,247                       08/536,910                       02/25/97
5,605,250                       08/249,364                       02/25/97
5,605,252                       08/419,473                       02/25/97
5,605,256                       08/360,072                       02/25/97
5,605,257                       08/610,228                       02/25/97
5,605,260                       08/420,670                       02/25/97
5,605,268                       08/353,316                       02/25/97
5,605,279                       08/554,255                       02/25/97
5,605,281                       08/424,505                       02/25/97
5,605,282                       08/425,283                       02/25/97
5,605,284                       08/512,183                       02/25/97
5,605,298                       08/359,329                       02/25/97
5,605,305                       08/408,697                       02/25/97
5,605,311                       08/309,119                       02/25/97
5,605,312                       08/511,995                       02/25/97
5,605,313                       08/503,282                       02/25/97
5,605,315                       08/502,552                       02/25/97
5,605,321                       08/284,257                       02/25/97
5,605,326                       08/342,372                       02/25/97
5,605,329                       08/307,783                       02/25/97
5,605,330                       08/525,996                       02/25/97
5,605,338                       08/524,481                       02/25/97
5,605,339                       08/514,865                       02/25/97
5,605,343                       08/474,381                       02/25/97
5,605,351                       08/582,899                       02/25/97
5,605,354                       08/502,325                       02/25/97
5,605,355                       08/554,075                       02/25/97
5,605,358                       08/543,172                       02/25/97
5,605,364                       08/500,805                       02/25/97
5,605,367                       08/559,241                       02/25/97
5,605,370                       08/192,530                       02/25/97
5,605,374                       08/502,963                       02/25/97
5,605,378                       08/578,463                       02/25/97
5,605,386                       08/462,364                       02/25/97
5,605,392                       08/367,693                       02/25/97
5,605,399                       08/544,325                       02/25/97
5,605,408                       08/559,065                       02/25/97
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