Notice of Expiration of Patents
                    Due to Failure to Pay Maintenance Fees

   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 December 7, 1994
                    DUE TO FAILURE TO PAY MAINTENANCE FEES

Patent Number              Serial Number                Issue Date

Re. 33,075                  07/277,278                   10/03/89
(4,625,545)                (06/720,037)                 (12/02/86)
Re. 33,303                  07/099,165                   08/21/90
(4,625,947)                (06/627,029)                 (12/02/86)
Re. 34,141                  07/739,332                   12/08/92
(4,975,478)                (07/388,799)                 (12/04/90)
Re. 34,194                  07/710,466                   03/16/93
(4,974,286)                (07/498,729)                 (12/04/90)
4,361,924                   06/276,952                   12/07/82
4,361,933                   06/262,628                   12/07/82
4,361,940                   06/289,945                   12/07/82
4,361,944                   06/270,384                   12/07/82
4,361,950                   06/242,284                   12/07/82
4,361,951                   06/256,412                   12/07/82
4,361,978                   06/215,820                   12/07/82
4,361,981                   06/268,777                   12/07/82
4,362,008                   06/218,313                   12/07/82
4,362,024                   06/227,190                   12/07/82
4,362,025                   06/238,595                   12/07/82
4,362,048                   06/217,927                   12/07/82
4,362,078                   06/222,232                   12/07/82
4,362,087                   06/247,887                   12/07/82
4,362,124                   06/261,930                   12/07/82
4,362,128                   06/277,896                   12/07/82
4,362,132                   06/224,256                   12/07/82
4,362,133                   06/261,804                   12/07/82
4,362,138                   06/252,224                   12/07/82
4,362,141                   06/228,785                   12/07/82
4,362,143                   06/257,344                   12/07/82
4,362,155                   06/247,205                   12/07/82
4,362,159                   06/309,542                   12/07/82
4,362,173                   06/247,561                   12/07/82
4,362,178                   06/245,060                   12/07/82
4,362,189                   06/223,203                   12/07/82
4,362,192                   06/240,964                   12/07/82
4,362,201                   06/243,712                   12/07/82
4,362,203                   06/248,536                   12/07/82
4,362,214                   06/226,295                   12/07/82
4,362,250                   06/247,660                   12/07/82
4,362,252                   06/354,141                   12/07/82
4,362,279                   06/230,949                   12/07/82
4,362,293                   06/235,393                   12/07/82
4,362,297                   06/269,774                   12/07/82
4,362,315                   06/229,020                   12/07/82
4,362,317                   06/216,078                   12/07/82
4,362,323                   06/237,722                   12/07/82
4,362,339                   06/227,895                   12/07/82
4,362,344                   06/289,491                   12/07/82
4,362,351                   06/232,089                   12/07/82
4,362,374                   06/305,770                   12/07/82
4,362,376                   06/262,398                   12/07/82
4,362,380                   06/269,168                   12/07/82
4,362,403                   06/289,793                   12/07/82
4,362,416                   06/226,738                   12/07/82
4,362,426                   06/261,212                   12/07/82
4,362,431                   06/263,640                   12/07/82
4,362,475                   06/243,828                   12/07/82
4,362,485                   06/264,099                   12/07/82
4,362,487                   06/292,529                   12/07/82
4,362,490                   06/282,169                   12/07/82
4,362,492                   06/310,856                   12/07/82
4,362,494                   06/310,986                   12/07/82
4,362,497                   06/293,513                   12/07/82
4,362,499                   06/220,694                   12/07/82
4,362,504                   06/266,819                   12/07/82
4,362,506                   06/253,463                   12/07/82
4,362,507                   06/255,270                   12/07/82
4,362,530                   06/245,290                   12/07/82
4,362,531                   06/254,037                   12/07/82
4,362,535                   06/269,013                   12/07/82
4,362,537                   06/238,843                   12/07/82
4,362,541                   06/258,205                   12/07/82
4,362,543                   06/245,831                   12/07/82
4,362,554                   06/241,396                   12/07/82
4,362,555                   06/241,397                   12/07/82
4,362,562                   06/236,087                   12/07/82
4,362,580                   06/251,535                   12/07/82
4,362,581                   06/229,990                   12/07/82
4,362,589                   06/325,132                   12/07/82
4,362,594                   06/245,452                   12/07/82
4,362,600                   06/293,212                   12/07/82
4,362,602                   06/283,188                   12/07/82
4,362,607                   06/284,580                   12/07/82
4,362,608                   06/266,303                   12/07/82
4,362,614                   06/259,296                   12/07/82
4,362,616                   06/248,045                   12/07/82
4,362,623                   06/314,217                   12/07/82
4,362,630                   06/224,597                   12/07/82
4,362,639                   06/297,892                   12/07/82
4,362,640                   06/302,528                   12/07/82
4,362,641                   06/302,934                   12/07/82
4,362,642                   06/280,973                   12/07/82
4,362,650                   06/261,819                   12/07/82
4,362,654                   06/263,642                   12/07/82
4,362,666                   06/310,666                   12/07/82
4,362,667                   06/226,868                   12/07/82
4,362,672                   06/286,974                   12/07/82
4,362,675                   06/228,409                   12/07/82
4,362,680                   06/222,905                   12/07/82
4,362,684                   06/248,543                   12/07/82
4,362,686                   06/218,667                   12/07/82
4,362,697                   06/255,759                   12/07/82
4,362,709                   06/318,970                   12/07/82
4,362,718                   06/245,651                   12/07/82
4,362,727                   06/306,940                   12/07/82
4,362,730                   06/283,706                   12/07/82
4,362,732                   06/349,749                   12/07/82
4,362,737                   06/253,876                   12/07/82
4,362,739                   06/260,415                   12/07/82
4,362,742                   06/251,177                   12/07/82
4,362,744                   06/245,484                   12/07/82
4,362,750                   06/226,262                   12/07/82
4,362,768                   06/293,035                   12/07/82
4,362,801                   06/310,277                   12/07/82
4,362,809                   06/248,761                   12/07/82
4,362,810                   06/223,696                   12/07/82
4,362,814                   06/332,056                   12/07/82
4,362,818                   06/235,103                   12/07/82
4,362,821                   06/316,194                   12/07/82
4,362,822                   06/316,196                   12/07/82
4,362,824                   06/268,528                   12/07/82
4,362,830                   06/220,406                   12/07/82
4,362,833                   06/264,524                   12/07/82
4,362,837                   06/246,771                   12/07/82
4,362,844                   06/267,422                   12/07/82
4,362,846                   06/254,621                   12/07/82
4,362,848                   06/268,444                   12/07/82
4,362,856                   06/302,931                   12/07/82
4,362,859                   06/294,345                   12/07/82
4,362,864                   06/263,421                   12/07/82
4,362,865                   06/235,678                   12/07/82
4,362,872                   06/305,053                   12/07/82
4,362,881                   06/339,343                   12/07/82
4,362,885                   06/330,355                   12/07/82
4,362,893                   06/270,037                   12/07/82
4,362,894                   06/260,148                   12/07/82
4,362,895                   06/303,969                   12/07/82
4,362,900                   06/300,752                   12/07/82
4,362,901                   06/300,926                   12/07/82
4,362,902                   06/248,604                   12/07/82
4,362,903                   06/220,331                   12/07/82
4,362,913                   06/269,254                   12/07/82
4,362,923                   06/245,975                   12/07/82
4,362,927                   06/241,613                   12/07/82
4,362,950                   06/295,994                   12/07/82
4,362,954                   06/305,558                   12/07/82
4,362,957                   06/220,670                   12/07/82
4,362,960                   06/259,274                   12/07/82
4,362,991                   06/215,572                   12/07/82
4,362,997                   06/217,942                   12/07/82
4,363,005                   06/243,941                   12/07/82
4,363,006                   06/238,098                   12/07/82
4,363,007                   06/256,825                   12/07/82
4,363,011                   06/242,536                   12/07/82
4,363,066                   06/245,788                   12/07/82
4,363,071                   06/243,776                   12/07/82
4,363,076                   06/221,103                   12/07/82
4,363,088                   06/223,261                   12/07/82
4,363,127                   06/224,367                   12/07/82
4,625,338                   06/731,022                   12/02/86
4,625,343                   06/785,254                   12/02/86
4,625,344                   06/756,287                   12/02/86
4,625,347                   06/642,765                   12/02/86
4,625,350                   06/676,488                   12/02/86
4,625,351                   06/771,418                   12/02/86
4,625,352                   06/645,323                   12/02/86
4,625,355                   06/681,827                   12/02/86
4,625,356                   06/742,369                   12/02/86
4,625,357                   06/771,353                   12/02/86
4,625,362                   06/584,252                   12/02/86
4,625,366                   06/787,996                   12/02/86
4,625,371                   06/783,349                   12/02/86
4,625,377                   06/763,558                   12/02/86
4,625,384                   06/655,309                   12/02/86
4,625,388                   06/558,923                   12/02/86
4,625,392                   06/772,819                   12/02/86
4,625,399                   06/593,929                   12/02/86
4,625,401                   06/775,716                   12/02/86
4,625,402                   06/726,038                   12/02/86
4,625,404                   06/702,605                   12/02/86
4,625,407                   06/764,589                   12/02/86
4,625,413                   06/784,310                   12/02/86
4,625,415                   06/705,713                   12/02/86
4,625,420                   06/829,174                   12/02/86
4,625,422                   06/786,665                   12/02/86
4,625,424                   06/687,515                   12/02/86
4,625,425                   06/782,480                   12/02/86
4,625,428                   06/727,732                   12/02/86
4,625,430                   06/741,227                   12/02/86
4,625,433                   06/724,697                   12/02/86
4,625,439                   06/632,072                   12/02/86
4,625,440                   06/759,769                   12/02/86
4,625,446                   06/831,612                   12/02/86
4,625,448                   06/741,897                   12/02/86
4,625,449                   06/714,277                   12/02/86
4,625,451                   06/773,791                   12/02/86
4,625,453                   06/748,217                   12/02/86
4,625,456                   06/831,292                   12/02/86
4,625,467                   06/758,857                   12/02/86
4,625,471                   06/620,476                   12/02/86
4,625,472                   06/544,697                   12/02/86
4,625,474                   06/595,965                   12/02/86
4,625,477                   06/808,765                   12/02/86
4,625,479                   06/631,101                   12/02/86
4,625,480                   06/766,593                   12/02/86
4,625,482                   06/519,187                   12/02/86
4,625,486                   06/693,469                   12/02/86
4,625,488                   06/726,142                   12/02/86
4,625,497                   06/777,069                   12/02/86
4,625,501                   06/701,241                   12/02/86
4,625,502                   06/692,601                   12/02/86
4,625,505                   06/706,513                   12/02/86
4,625,508                   06/710,804                   12/02/86
4,625,509                   06/508,416                   12/02/86
4,625,512                   06/823,829                   12/02/86
4,625,516                   06/637,084                   12/02/86
4,625,517                   06/818,089                   12/02/86
4,625,522                   06/817,386                   12/02/86
4,625,527                   06/850,603                   12/02/86
4,625,528                   06/820,592                   12/02/86
4,625,532                   06/631,787                   12/02/86
4,625,534                   06/663,988                   12/02/86
4,625,542                   06/775,625                   12/02/86
4,625,546                   06/672,366                   12/02/86
4,625,550                   06/732,697                   12/02/86
4,625,551                   06/685,478                   12/02/86
4,625,561                   06/678,902                   12/02/86
4,625,563                   06/792,027                   12/02/86
4,625,569                   06/691,948                   12/02/86
4,625,573                   06/737,372                   12/02/86
4,625,574                   06/769,136                   12/02/86
4,625,581                   06/690,278                   12/02/86
4,625,584                   06/795,255                   12/02/86
4,625,586                   06/663,508                   12/02/86
4,625,587                   06/697,265                   12/02/86
4,625,598                   06/732,688                   12/02/86
4,625,599                   06/757,265                   12/02/86
4,625,600                   06/771,698                   12/02/86
4,625,601                   06/641,135                   12/02/86
4,625,602                   06/815,733                   12/02/86
4,625,609                   06/757,027                   12/02/86
4,625,611                   06/721,561                   12/02/86
4,625,612                   06/779,070                   12/02/86
4,625,613                   06/596,671                   12/02/86
4,625,615                   06/772,053                   12/02/86
4,625,617                   06/754,625                   12/02/86
4,625,618                   06/569,795                   12/02/86
4,625,619                   06/627,330                   12/02/86
4,625,622                   06/765,796                   12/02/86
4,625,624                   06/677,063                   12/02/86
4,625,628                   06/842,061                   12/02/86
4,625,633                   06/767,547                   12/02/86
4,625,634                   06/765,494                   12/02/86
4,625,635                   06/702,928                   12/02/86
4,625,636                   06/716,448                   12/02/86
4,625,639                   06/730,648                   12/02/86
4,625,641                   06/712,733                   12/02/86
4,625,643                   06/639,212                   12/02/86
4,625,658                   06/621,158                   12/02/86
4,625,666                   06/808,961                   12/02/86
4,625,671                   06/594,464                   12/02/86
4,625,674                   06/634,608                   12/02/86
4,625,675                   06/790,795                   12/02/86
4,625,678                   06/740,306                   12/02/86
4,625,683                   06/723,862                   12/02/86
4,625,684                   06/642,127                   12/02/86
4,625,686                   06/681,220                   12/02/86
4,625,695                   06/717,017                   12/02/86
4,625,696                   06/700,953                   12/02/86
4,625,698                   06/768,638                   12/02/86
4,625,701                   06/701,210                   12/02/86
4,625,706                   06/767,093                   12/02/86
4,625,707                   06/790,697                   12/02/86
4,625,708                   06/801,285                   12/02/86
4,625,709                   06/741,732                   12/02/86
4,625,723                   06/705,966                   12/02/86
4,625,727                   06/694,614                   12/02/86
4,625,731                   06/659,402                   12/02/86
4,625,736                   06/513,428                   12/02/86
4,625,737                   06/723,883                   12/02/86
4,625,739                   06/688,135                   12/02/86
4,625,740                   06/491,375                   12/02/86
4,625,741                   06/643,557                   12/02/86
4,625,750                   06/732,785                   12/02/86
4,625,752                   06/239,633                   12/02/86
4,625,756                   06/573,965                   12/02/86
4,625,761                   06/667,260                   12/02/86
4,625,762                   06/796,665                   12/02/86
4,625,765                   06/783,184                   12/02/86
4,625,766                   06/591,428                   12/02/86
4,625,772                   06/695,860                   12/02/86
4,625,775                   06/716,680                   12/02/86
4,625,776                   06/753,652                   12/02/86
4,625,778                   06/727,731                   12/02/86
4,625,779                   06/779,384                   12/02/86
4,625,783                   06/466,509                   12/02/86
4,625,786                   06/678,473                   12/02/86
4,625,793                   06/775,673                   12/02/86
4,625,794                   06/653,790                   12/02/86
4,625,797                   06/706,132                   12/02/86
4,625,798                   06/697,051                   12/02/86
4,625,799                   06/746,313                   12/02/86
4,625,800                   06/673,632                   12/02/86
4,625,803                   06/736,160                   12/02/86
4,625,804                   06/709,604                   12/02/86
4,625,809                   06/720,418                   12/02/86
4,625,810                   06/706,128                   12/02/86
4,625,812                   06/718,520                   12/02/86
4,625,815                   06/614,433                   12/02/86
4,625,823                   06/651,166                   12/02/86
4,625,826                   06/740,785                   12/02/86
4,625,828                   06/773,641                   12/02/86
4,625,836                   06/549,318                   12/02/86
4,625,837                   06/714,698                   12/02/86
4,625,838                   06/718,016                   12/02/86
4,625,840                   06/640,316                   12/02/86
4,625,859                   06/675,317                   12/02/86
4,625,861                   06/726,905                   12/02/86
4,625,866                   06/734,475                   12/02/86
4,625,869                   06/824,539                   12/02/86
4,625,878                   06/697,102                   12/02/86
4,625,880                   06/751,381                   12/02/86
4,625,882                   06/691,559                   12/02/86
4,625,883                   06/693,527                   12/02/86
4,625,888                   06/799,139                   12/02/86
4,625,889                   06/789,510                   12/02/86
4,625,891                   06/811,353                   12/02/86
4,625,896                   06/699,371                   12/02/86
4,625,900                   06/615,462                   12/02/86
4,625,901                   06/784,039                   12/02/86
4,625,902                   06/821,510                   12/02/86
4,625,903                   06/627,428                   12/02/86
4,625,904                   06/802,087                   12/02/86
4,625,905                   06/831,088                   12/02/86
4,625,906                   06/723,715                   12/02/86
4,625,907                   06/700,849                   12/02/86
4,625,908                   06/546,906                   12/02/86
4,625,909                   06/564,636                   12/02/86
4,625,913                   06/624,981                   12/02/86
4,625,916                   06/630,269                   12/02/86
4,625,917                   06/820,009                   12/02/86
4,625,920                   06/251,017                   12/02/86
4,625,929                   06/628,728                   12/02/86
4,625,930                   06/666,187                   12/02/86
4,625,933                   06/651,089                   12/02/86
4,625,937                   06/735,111                   12/02/86
4,625,943                   06/668,217                   12/02/86
4,625,944                   06/814,590                   12/02/86
4,625,949                   06/757,327                   12/02/86
4,625,954                   06/787,496                   12/02/86
4,625,956                   06/724,916                   12/02/86
4,625,959                   06/610,867                   12/02/86
4,625,960                   06/711,751                   12/02/86
4,625,962                   06/663,169                   12/02/86
4,625,965                   06/749,776                   12/02/86
4,625,974                   06/687,833                   12/02/86
4,625,980                   06/749,974                   12/02/86
4,625,986                   06/742,886                   12/02/86
4,625,989                   06/809,592                   12/02/86
4,625,995                   06/708,528                   12/02/86
4,626,000                   06/530,230                   12/02/86
4,626,001                   06/601,007                   12/02/86
4,626,004                   06/482,219                   12/02/86
4,626,012                   06/651,930                   12/02/86
4,626,014                   06/791,859                   12/02/86
4,626,021                   06/720,742                   12/02/86
4,626,024                   06/752,123                   12/02/86
4,626,025                   06/606,576                   12/02/86
4,626,027                   06/698,778                   12/02/86
4,626,028                   06/659,626                   12/02/86
4,626,029                   06/816,680                   12/02/86
4,626,030                   06/766,897                   12/02/86
4,626,031                   06/684,976                   12/02/86
4,626,032                   06/621,781                   12/02/86
4,626,033                   06/672,602                   12/02/86
4,626,037                   06/792,511                   12/02/86
4,626,039                   06/705,940                   12/02/86
4,626,041                   06/616,956                   12/02/86
4,626,044                   06/639,817                   12/02/86
4,626,046                   06/692,802                   12/02/86
4,626,050                   06/772,424                   12/02/86
4,626,061                   06/792,813                   12/02/86
4,626,063                   06/686,265                   12/02/86
4,626,065                   06/463,088                   12/02/86
4,626,066                   06/567,430                   12/02/86
4,626,067                   06/403,095                   12/02/86
4,626,068                   06/403,215                   12/02/86
4,626,073                   06/628,288                   12/02/86
4,626,074                   06/605,508                   12/02/86
4,626,085                   06/795,458                   12/02/86
4,626,086                   06/756,950                   12/02/86
4,626,087                   06/756,953                   12/02/86
4,626,088                   06/683,389                   12/02/86
4,626,097                   06/623,778                   12/02/86
4,626,098                   06/779,142                   12/02/86
4,626,099                   06/788,283                   12/02/86
4,626,100                   06/565,788                   12/02/86
4,626,102                   06/698,847                   12/02/86
4,626,106                   06/790,345                   12/02/86
4,626,107                   06/781,250                   12/02/86
4,626,109                   06/807,456                   12/02/86
4,626,111                   06/758,733                   12/02/86
4,626,112                   06/574,314                   12/02/86
4,626,113                   06/713,575                   12/02/86
4,626,116                   06/708,524                   12/02/86
4,626,119                   06/752,133                   12/02/86
4,626,121                   06/755,611                   12/02/86
4,626,123                   06/551,996                   12/02/86
4,626,124                   06/811,277                   12/02/86
4,626,125                   06/809,944                   12/02/86
4,626,128                   06/722,285                   12/02/86
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