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 AUGUST 30, 1995
                    DUE TO FAILURE TO PAY MAINTENANCE FEES

Patent Number              Serial Number               Issue Date

Re. 33,577                  07/383,315                   04/23/91
(4,689,517)                (06/881,525)                (08/25/87)
Re. 34,210                  07/347,430                   04/06/93
(4,688,386)                (06/827,083)                (08/25/87)
4,400,833                   06/272,134                   08/30/83
4,400,838                   06/271,302                   08/30/83
4,400,845                   06/265,691                   08/30/83
4,400,846                   06/307,850                   08/30/83
4,400,848                   06/236,551                   08/30/83
4,400,856                   06/357,088                   08/30/83
4,400,868                   06/351,707                   08/30/83
4,400,869                   06/233,728                   08/30/83
4,400,872                   06/292,526                   08/30/83
4,400,875                   06/264,734                   08/30/83
4,400,876                   06/315,013                   08/30/83
4,400,877                   06/338,431                   08/30/83
4,400,882                   06/288,722                   08/30/83
4,400,887                   06/284,456                   08/30/83
4,400,888                   06/308,535                   08/30/83
4,400,893                   06/300,515                   08/30/83
4,400,898                   06/292,454                   08/30/83
4,400,903                   06/255,293                   08/30/83
4,400,914                   06/287,762                   08/30/83
4,400,920                   06/254,924                   08/30/83
4,400,923                   06/298,694                   08/30/83
4,400,938                   06/238,527                   08/30/83
4,400,942                   06/253,416                   08/30/83
4,400,949                   06/352,874                   08/30/83
4,400,951                   06/312,802                   08/30/83
4,400,952                   06/329,139                   08/30/83
4,400,958                   06/284,996                   08/30/83
4,400,960                   06/263,140                   08/30/83
4,400,971                   06/268,279                   08/30/83
4,400,980                   06/297,913                   08/30/83
4,400,986                   06/227,244                   08/30/83
4,400,988                   06/288,703                   08/30/83
4,400,993                   06/276,802                   08/30/83
4,400,994                   06/335,834                   08/30/83
4,400,996                   06/306,833                   08/30/83
4,401,008                   06/293,817                   08/30/83
4,401,012                   06/270,731                   08/30/83
4,401,020                   06/331,153                   08/30/83
4,401,021                   06/279,621                   08/30/83
4,401,022                   06/274,064                   08/30/83
4,401,023                   06/281,345                   08/30/83
4,401,024                   06/366,119                   08/30/83
4,401,025                   06/375,212                   08/30/83
4,401,026                   06/340,213                   08/30/83
4,401,031                   06/334,933                   08/30/83
4,401,032                   06/368,266                   08/30/83
4,401,036                   06/230,994                   08/30/83
4,401,040                   06/313,468                   08/30/83
4,401,041                   06/256,043                   08/30/83
4,401,042                   06/245,671                   08/30/83
4,401,063                   06/251,688                   08/30/83
4,401,067                   06/282,655                   08/30/83
4,401,071                   06/223,123                   08/30/83
4,401,074                   06/285,145                   08/30/83
4,401,076                   06/369,028                   08/30/83
4,401,089                   06/232,693                   08/30/83
4,401,093                   06/386,565                   08/30/83
4,401,107                   06/370,099                   08/30/83
4,401,114                   06/252,263                   08/30/83
4,401,118                   06/267,690                   08/30/83
4,401,120                   06/292,066                   08/30/83
4,401,121                   06/231,921                   08/30/83
4,401,125                   06/304,395                   08/30/83
4,401,126                   06/237,157                   08/30/83
4,401,127                   06/231,130                   08/30/83
4,401,131                   06/264,097                   08/30/83
4,401,134                   06/240,875                   08/30/83
4,401,138                   06/288,489                   08/30/83
4,401,140                   06/315,217                   08/30/83
4,401,145                   06/320,824                   08/30/83
4,401,149                   06/315,256                   08/30/83
4,401,155                   06/234,258                   08/30/83
4,401,160                   06/284,747                   08/30/83
4,401,161                   06/339,972                   08/30/83
4,401,162                   06/310,786                   08/30/83
4,401,163                   06/220,645                   08/30/83
4,401,166                   06/298,103                   08/30/83
4,401,174                   06/267,740                   08/30/83
4,401,175                   06/283,773                   08/30/83
4,401,192                   06/309,281                   08/30/83
4,401,199                   06/243,672                   08/30/83
4,401,204                   06/228,421                   08/30/83
4,401,220                   06/262,989                   08/30/83
4,401,227                   06/293,158                   08/30/83
4,401,233                   06/245,662                   08/30/83
4,401,247                   06/243,930                   08/30/83
4,401,249                   06/335,421                   08/30/83
4,401,256                   06/329,478                   08/30/83
4,401,263                   06/265,599                   08/30/83
4,401,274                   06/240,287                   08/30/83
4,401,275                   06/221,444                   08/30/83
4,401,281                   06/275,364                   08/30/83
4,401,283                   06/323,472                   08/30/83
4,401,285                   06/256,252                   08/30/83
4,401,288                   06/243,614                   08/30/83
4,401,291                   06/231,492                   08/30/83
4,401,301                   06/265,280                   08/30/83
4,401,304                   06/222,707                   08/30/83
4,401,305                   06/258,582                   08/30/83
4,401,323                   06/271,040                   08/30/83
4,401,326                   06/331,111                   08/30/83
4,401,327                   06/361,525                   08/30/83
4,401,328                   06/341,150                   08/30/83
4,401,334                   06/290,779                   08/30/83
4,401,336                   06/235,037                   08/30/83
4,401,339                   06/216,375                   08/30/83
4,401,340                   06/326,856                   08/30/83
4,401,344                   06/308,654                   08/30/83
4,401,348                   06/233,333                   08/30/83
4,401,349                   06/314,457                   08/30/83
4,401,355                   06/279,459                   08/30/83
4,401,366                   06/259,009                   08/30/83
4,401,369                   06/312,678                   08/30/83
4,401,382                   06/298,952                   08/30/83
4,401,389                   06/339,806                   08/30/83
4,401,391                   06/257,133                   08/30/83
4,401,392                   06/425,255                   08/30/83
4,401,393                   06/439,009                   08/30/83
4,401,399                   06/278,034                   08/30/83
4,401,401                   06/299,778                   08/30/83
4,401,402                   06/273,558                   08/30/83
4,401,426                   06/238,878                   08/30/83
4,401,429                   06/238,551                   08/30/83
4,401,432                   06/382,290                   08/30/83
4,401,439                   06/336,222                   08/30/83
4,401,444                   06/297,061                   08/30/83
4,401,445                   06/244,718                   08/30/83
4,401,449                   06/373,054                   08/30/83
4,401,452                   06/361,179                   08/30/83
4,401,456                   06/258,489                   08/30/83
4,401,460                   06/295,301                   08/30/83
4,401,464                   06/367,794                   08/30/83
4,401,468                   06/461,855                   08/30/83
4,401,470                   06/249,050                   08/30/83
4,401,478                   06/373,564                   08/30/83
4,401,485                   06/285,788                   08/30/83
4,401,488                   06/370,691                   08/30/83
4,401,490                   06/447,135                   08/30/83
4,401,491                   06/255,026                   08/30/83
4,401,497                   06/323,035                   08/30/83
4,401,510                   06/297,400                   08/30/83
4,401,511                   06/263,933                   08/30/83
4,401,513                   06/335,109                   08/30/83
4,401,514                   06/245,076                   08/30/83
4,401,523                   06/379,962                   08/30/83
4,401,542                   06/267,712                   08/30/83
4,401,544                   06/268,742                   08/30/83
4,401,548                   06/233,993                   08/30/83
4,401,549                   06/322,335                   08/30/83
4,401,550                   06/338,737                   08/30/83
4,401,552                   06/253,473                   08/30/83
4,401,554                   06/396,977                   08/30/83
4,401,558                   06/318,554                   08/30/83
4,401,559                   06/370,237                   08/30/83
4,401,561                   06/333,085                   08/30/83
4,401,563                   06/401,530                   08/30/83
4,401,566                   06/283,518                   08/30/83
4,401,570                   06/382,018                   08/30/83
4,401,572                   06/274,971                   08/30/83
4,401,573                   06/261,885                   08/30/83
4,401,578                   06/407,520                   08/30/83
4,401,581                   06/358,344                   08/30/83
4,401,585                   06/341,390                   08/30/83
4,401,587                   06/331,448                   08/30/83
4,401,588                   06/401,309                   08/30/83
4,401,590                   06/247,316                   08/30/83
4,401,593                   06/348,472                   08/30/83
4,401,594                   06/300,443                   08/30/83
4,401,596                   06/317,584                   08/30/83
4,401,598                   06/312,979                   08/30/83
4,401,605                   06/377,880                   08/30/83
4,401,609                   06/322,802                   08/30/83
4,401,611                   06/320,290                   08/30/83
4,401,613                   06/289,812                   08/30/83
4,401,615                   06/268,343                   08/30/83
4,401,616                   06/294,084                   08/30/83
4,401,619                   06/219,560                   08/30/83
4,401,628                   06/226,336                   08/30/83
4,401,629                   06/242,410                   08/30/83
4,401,633                   06/343,647                   08/30/83
4,401,634                   06/343,648                   08/30/83
4,401,638                   06/333,257                   08/30/83
4,401,640                   06/420,779                   08/30/83
4,401,652                   06/290,175                   08/30/83
4,401,657                   06/328,996                   08/30/83
4,401,658                   06/331,593                   08/30/83
4,401,661                   06/369,048                   08/30/83
4,401,664                   06/328,995                   08/30/83
4,401,666                   06/344,666                   08/30/83
4,401,675                   06/308,137                   08/30/83
4,401,677                   06/310,192                   08/30/83
4,401,681                   06/304,356                   08/30/83
4,401,682                   06/256,022                   08/30/83
4,401,686                   06/346,941                   08/30/83
4,401,687                   06/320,451                   08/30/83
4,401,690                   06/344,906                   08/30/83
4,401,692                   06/288,694                   08/30/83
4,401,713                   06/300,754                   08/30/83
4,401,716                   06/410,118                   08/30/83
4,401,718                   06/437,772                   08/30/83
4,401,727                   06/391,217                   08/30/83
4,401,731                   06/293,951                   08/30/83
4,401,734                   06/297,374                   08/30/83
4,401,739                   06/365,089                   08/30/83
4,401,755                   06/229,483                   08/30/83
4,401,756                   06/249,905                   08/30/83
4,401,759                   06/366,593                   08/30/83
4,401,770                   06/364,551                   08/30/83
4,401,772                   06/368,614                   08/30/83
4,401,778                   06/303,159                   08/30/83
4,401,781                   06/414,825                   08/30/83
4,401,790                   06/281,349                   08/30/83
4,401,793                   06/299,390                   08/30/83
4,401,795                   06/223,441                   08/30/83
4,401,797                   06/265,304                   08/30/83
4,401,802                   06/224,077                   08/30/83
4,401,803                   06/342,007                   08/30/83
4,401,804                   06/381,128                   08/30/83
4,401,805                   06/353,715                   08/30/83
4,401,808                   06/317,282                   08/30/83
4,401,813                   06/331,299                   08/30/83
4,401,814                   06/331,034                   08/30/83
4,401,816                   06/244,173                   08/30/83
4,401,819                   06/360,567                   08/30/83
4,401,820                   06/337,322                   08/30/83
4,401,823                   06/260,865                   08/30/83
4,401,826                   06/416,577                   08/30/83
4,401,829                   06/300,920                   08/30/83
4,401,830                   06/222,155                   08/30/83
4,401,832                   06/291,896                   08/30/83
4,401,835                   06/303,229                   08/30/83
4,401,850                   06/237,320                   08/30/83
4,401,851                   06/239,647                   08/30/83
4,401,854                   06/289,835                   08/30/83
4,401,857                   06/323,093                   08/30/83
4,401,866                   06/267,481                   08/30/83
4,401,871                   06/339,308                   08/30/83
4,401,872                   06/377,030                   08/30/83
4,401,874                   06/240,816                   08/30/83
4,401,877                   06/337,921                   08/30/83
4,401,879                   06/236,389                   08/30/83
4,401,881                   06/244,796                   08/30/83
4,401,886                   06/246,439                   08/30/83
4,401,893                   06/288,010                   08/30/83
4,401,895                   06/420,598                   08/30/83
4,401,896                   06/266,714                   08/30/83
4,401,906                   06/242,205                   08/30/83
4,401,910                   06/325,679                   08/30/83
4,401,915                   06/251,546                   08/30/83
4,401,921                   06/326,638                   08/30/83
4,401,929                   06/281,378                   08/30/83
4,401,942                   06/265,453                   08/30/83
4,401,945                   06/259,257                   08/30/83
4,401,953                   06/284,290                   08/30/83
4,401,955                   06/283,604                   08/30/83
4,401,957                   06/230,323                   08/30/83
4,401,962                   06/438,425                   08/30/83
4,401,963                   06/330,251                   08/30/83
4,401,964                   06/254,378                   08/30/83
4,401,969                   06/309,735                   08/30/83
4,401,977                   06/222,942                   08/30/83
4,401,980                   06/297,806                   08/30/83
4,402,003                   06/224,078                   08/30/83
4,402,014                   06/286,232                   08/30/83
4,402,017                   06/304,462                   08/30/83
4,402,018                   06/270,592                   08/30/83
4,402,020                   06/236,836                   08/30/83
4,402,023                   06/239,541                   08/30/83
4,402,027                   06/293,984                   08/30/83
4,402,028                   06/293,531                   08/30/83
4,402,030                   06/350,498                   08/30/83
4,402,052                   06/253,127                   08/30/83
4,402,055                   06/229,029                   08/30/83
4,402,059                   06/252,685                   08/30/83
4,402,064                   06/324,686                   08/30/83
4,402,068                   06/297,662                   08/30/83
4,402,069                   06/270,061                   08/30/83
4,402,077                   06/219,546                   08/30/83
4,402,078                   06/242,304                   08/30/83
4,402,086                   06/237,897                   08/30/83
4,402,088                   06/252,556                   08/30/83
4,688,270                   06/935,749                   08/25/87
4,688,272                   06/721,634                   08/25/87
4,688,273                   06/794,922                   08/25/87
4,688,274                   06/806,295                   08/25/87
4,688,276                   06/836,828                   08/25/87
4,688,278                   06/796,794                   08/25/87
4,688,282                   06/890,320                   08/25/87
4,688,285                   06/910,079                   08/25/87
4,688,286                   06/861,299                   08/25/87
4,688,291                   06/840,142                   08/25/87
4,688,294                   06/857,074                   08/25/87
4,688,298                   06/757,848                   08/25/87
4,688,299                   06/817,092                   08/25/87
4,688,304                   06/792,242                   08/25/87
4,688,308                   06/769,541                   08/25/87
4,688,317                   06/766,778                   08/25/87
4,688,319                   06/652,206                   08/25/87
4,688,320                   06/908,922                   08/25/87
4,688,326                   06/900,647                   08/25/87
4,688,328                   06/939,143                   08/25/87
4,688,329                   06/774,417                   08/25/87
4,688,334                   06/865,140                   08/25/87
4,688,347                   06/794,655                   08/25/87
4,688,348                   06/890,781                   08/25/87
4,688,352                   06/715,472                   08/25/87
4,688,361                   06/860,045                   08/25/87
4,688,362                   06/846,262                   08/25/87
4,688,366                   06/889,242                   08/25/87
4,688,369                   06/756,934                   08/25/87
4,688,370                   06/830,033                   08/25/87
4,688,371                   06/841,525                   08/25/87
4,688,372                   06/881,452                   08/25/87
4,688,373                   06/876,172                   08/25/87
4,688,375                   06/875,924                   08/25/87
4,688,376                   06/863,355                   08/25/87
4,688,380                   06/893,015                   08/25/87
4,688,381                   06/794,237                   08/25/87
4,688,382                   06/781,879                   08/25/87
4,688,391                   06/942,759                   08/25/87
4,688,397                   06/804,294                   08/25/87
4,688,399                   06/883,860                   08/25/87
4,688,401                   06/625,516                   08/25/87
4,688,403                   06/929,086                   08/25/87
4,688,407                   06/779,820                   08/25/87
4,688,412                   06/836,375                   08/25/87
4,688,415                   06/877,576                   08/25/87
4,688,416                   06/797,337                   08/25/87
4,688,418                   06/788,286                   08/25/87
4,688,423                   06/722,570                   08/25/87
4,688,426                   06/800,046                   08/25/87
4,688,427                   06/850,991                   08/25/87
4,688,429                   06/837,031                   08/25/87
4,688,431                   06/743,442                   08/25/87
4,688,438                   06/797,416                   08/25/87
4,688,441                   06/848,307                   08/25/87
4,688,442                   06/870,668                   08/25/87
4,688,452                   06/740,561                   08/25/87
4,688,454                   06/759,658                   08/25/87
4,688,455                   06/825,928                   08/25/87
4,688,462                   06/888,055                   08/25/87
4,688,465                   06/703,572                   08/25/87
4,688,467                   06/932,627                   08/25/87
4,688,468                   06/818,983                   08/25/87
4,688,470                   06/887,586                   08/25/87
4,688,471                   06/856,839                   08/25/87
4,688,473                   06/770,873                   08/25/87
4,688,474                   06/808,425                   08/25/87
4,688,482                   06/824,614                   08/25/87
4,688,485                   06/711,377                   08/25/87
4,688,486                   06/685,780                   08/25/87
4,688,490                   06/783,943                   08/25/87
4,688,498                   07/002,453                   08/25/87
4,688,500                   06/834,549                   08/25/87
4,688,502                   06/854,254                   08/25/87
4,688,511                   06/761,289                   08/25/87
4,688,515                   06/841,894                   08/25/87
4,688,516                   06/682,224                   08/25/87
4,688,522                   06/877,142                   08/25/87
4,688,528                   06/812,081                   08/25/87
4,688,534                   06/893,010                   08/25/87
4,688,538                   06/688,036                   08/25/87
4,688,541                   06/888,879                   08/25/87
4,688,548                   06/841,592                   08/25/87
4,688,552                   06/893,107                   08/25/87
4,688,554                   06/850,173                   08/25/87
4,688,559                   06/856,190                   08/25/87
4,688,560                   06/814,914                   08/25/87
4,688,564                   06/898,791                   08/25/87
4,688,569                   06/872,166                   08/25/87
4,688,570                   06/483,510                   08/25/87
4,688,574                   06/744,938                   08/25/87
4,688,575                   06/357,568                   08/25/87
4,688,588                   06/844,180                   08/25/87
4,688,599                   06/798,308                   08/25/87
4,688,600                   06/833,365                   08/25/87
4,688,601                   06/853,711                   08/25/87
4,688,604                   06/680,522                   08/25/87
4,688,607                   06/758,598                   08/25/87
4,688,610                   06/713,697                   08/25/87
4,688,612                   06/890,108                   08/25/87
4,688,614                   06/731,309                   08/25/87
4,688,616                   06/775,004                   08/25/87
4,688,619                   06/858,522                   08/25/87
4,688,627                   06/804,769                   08/25/87
4,688,628                   06/805,686                   08/25/87
4,688,638                   06/866,859                   08/25/87
4,688,639                   06/946,746                   08/25/87
4,688,640                   06/876,580                   08/25/87
4,688,643                   06/851,131                   08/25/87
4,688,644                   06/851,105                   08/25/87
4,688,645                   06/783,754                   08/25/87
4,688,646                   06/474,424                   08/25/87
4,688,650                   06/801,469                   08/25/87
4,688,654                   06/841,578                   08/25/87
4,688,659                   06/947,877                   08/25/87
4,688,662                   06/734,494                   08/25/87
4,688,663                   06/629,109                   08/25/87
4,688,664                   06/782,967                   08/25/87
4,688,667                   06/791,059                   08/25/87
4,688,669                   06/702,697                   08/25/87
4,688,673                   06/765,350                   08/25/87
4,688,676                   06/939,048                   08/25/87
4,688,680                   06/713,305                   08/25/87
4,688,681                   06/820,164                   08/25/87
4,688,685                   06/803,301                   08/25/87
4,688,687                   06/910,318                   08/25/87
4,688,702                   06/811,431                   08/25/87
4,688,705                   06/886,004                   08/25/87
4,688,708                   06/908,893                   08/25/87
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