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 AUGUST 23, 1995
                    DUE TO FAILURE TO PAY MAINTENANCE FEES

Patent Number              Serial Number               Issue Date

Re. 32,409                  06/767,525                   04/28/87
(4,399,833)                (06/345,660)                (08/23/83)
Re. 33,765                  07/394,741                   12/10/91
(4,688,116)                (06/858,023)                (08/18/87)
4,399,570                   06/321,549                   08/23/83
4,399,571                   06/275,490                   08/23/83
4,399,587                   06/247,286                   08/23/83
4,399,588                   06/288,628                   08/23/83
4,399,594                   06/289,337                   08/23/83
4,399,601                   06/402,172                   08/23/83
4,399,604                   06/331,674                   08/23/83
4,399,612                   06/276,798                   08/23/83
4,399,613                   06/356,032                   08/23/83
4,399,614                   06/256,957                   08/23/83
4,399,616                   06/309,118                   08/23/83
4,399,619                   06/263,399                   08/23/83
4,399,621                   06/306,864                   08/23/83
4,399,623                   06/273,767                   08/23/83
4,399,624                   06/270,359                   08/23/83
4,399,629                   06/240,688                   08/23/83
4,399,632                   06/271,440                   08/23/83
4,399,640                   06/271,560                   08/23/83
4,399,646                   06/302,594                   08/23/83
4,399,647                   06/289,052                   08/23/83
4,399,648                   06/276,789                   08/23/83
4,399,650                   06/324,465                   08/23/83
4,399,655                   06/301,045                   08/23/83
4,399,664                   06/327,858                   08/23/83
4,399,665                   06/327,813                   08/23/83
4,399,669                   06/242,855                   08/23/83
4,399,673                   06/320,589                   08/23/83
4,399,675                   06/316,390                   08/23/83
4,399,686                   06/231,942                   08/23/83
4,399,689                   06/240,544                   08/23/83
4,399,691                   06/286,852                   08/23/83
4,399,692                   06/224,789                   08/23/83
4,399,704                   06/270,049                   08/23/83
4,399,706                   06/409,081                   08/23/83
4,399,709                   06/237,517                   08/23/83
4,399,710                   06/292,240                   08/23/83
4,399,714                   06/319,620                   08/23/83
4,399,718                   06/267,756                   08/23/83
4,399,739                   06/217,049                   08/23/83
4,399,751                   06/322,463                   08/23/83
4,399,752                   06/263,970                   08/23/83
4,399,760                   06/314,362                   08/23/83
4,399,763                   06/263,585                   08/23/83
4,399,770                   06/360,563                   08/23/83
4,399,771                   06/293,427                   08/23/83
4,399,777                   06/293,274                   08/23/83
4,399,780                   06/314,227                   08/23/83
4,399,781                   06/229,632                   08/23/83
4,399,789                   06/232,406                   08/23/83
4,399,791                   06/294,506                   08/23/83
4,399,795                   06/284,042                   08/23/83
4,399,812                   06/336,166                   08/23/83
4,399,821                   06/236,058                   08/23/83
4,399,823                   06/308,361                   08/23/83
4,399,824                   06/308,362                   08/23/83
4,399,825                   06/270,205                   08/23/83
4,399,827                   06/264,168                   08/23/83
4,399,842                   06/358,666                   08/23/83
4,399,849                   06/281,604                   08/23/83
4,399,850                   06/231,600                   08/23/83
4,399,852                   06/316,023                   08/23/83
4,399,854                   06/273,978                   08/23/83
4,399,862                   06/293,056                   08/23/83
4,399,863                   06/332,380                   08/23/83
4,399,864                   06/329,302                   08/23/83
4,399,865                   06/284,748                   08/23/83
4,399,866                   06/253,114                   08/23/83
4,399,870                   06/313,901                   08/23/83
4,399,872                   06/340,144                   08/23/83
4,399,875                   06/372,159                   08/23/83
4,399,877                   06/255,024                   08/23/83
4,399,878                   06/293,710                   08/23/83
4,399,883                   06/257,636                   08/23/83
4,399,885                   06/265,923                   08/23/83
4,399,888                   06/251,110                   08/23/83
4,399,889                   06/239,450                   08/23/83
4,399,890                   06/265,407                   08/23/83
4,399,892                   06/300,978                   08/23/83
4,399,896                   06/277,419                   08/23/83
4,399,906                   06/227,253                   08/23/83
4,399,913                   06/264,948                   08/23/83
4,399,915                   06/311,799                   08/23/83
4,399,918                   06/239,701                   08/23/83
4,399,925                   06/369,216                   08/23/83
4,399,929                   06/286,075                   08/23/83
4,399,930                   06/317,384                   08/23/83
4,399,932                   06/269,462                   08/23/83
4,399,933                   06/287,322                   08/23/83
4,399,935                   06/233,406                   08/23/83
4,399,941                   06/253,853                   08/23/83
4,399,942                   06/319,462                   08/23/83
4,399,945                   06/221,443                   08/23/83
4,399,950                   06/269,017                   08/23/83
4,399,953                   06/322,577                   08/23/83
4,399,957                   06/326,765                   08/23/83
4,399,972                   06/253,274                   08/23/83
4,399,974                   06/329,570                   08/23/83
4,399,986                   06/330,471                   08/23/83
4,399,987                   06/279,420                   08/23/83
4,399,988                   06/324,131                   08/23/83
4,399,990                   06/305,988                   08/23/83
4,399,999                   06/366,459                   08/23/83
4,400,001                   06/278,855                   08/23/83
4,400,004                   06/294,775                   08/23/83
4,400,009                   06/270,607                   08/23/83
4,400,010                   06/247,215                   08/23/83
4,400,011                   06/244,892                   08/23/83
4,400,017                   06/272,100                   08/23/83
4,400,019                   06/256,492                   08/23/83
4,400,034                   06/232,618                   08/23/83
4,400,038                   06/290,337                   08/23/83
4,400,046                   06/243,454                   08/23/83
4,400,048                   06/309,857                   08/23/83
4,400,050                   06/264,640                   08/23/83
4,400,054                   06/341,873                   08/23/83
4,400,058                   06/384,842                   08/23/83
4,400,059                   06/261,033                   08/23/83
4,400,063                   06/271,284                   08/23/83
4,400,067                   06/328,603                   08/23/83
4,400,069                   06/264,620                   08/23/83
4,400,074                   06/353,031                   08/23/83
4,400,078                   06/364,654                   08/23/83
4,400,080                   06/304,469                   08/23/83
4,400,083                   06/307,499                   08/23/83
4,400,085                   06/417,694                   08/23/83
4,400,089                   06/225,541                   08/23/83
4,400,090                   06/299,571                   08/23/83
4,400,101                   06/250,117                   08/23/83
4,400,107                   06/229,684                   08/23/83
4,400,118                   06/281,869                   08/23/83
4,400,122                   06/226,280                   08/23/83
4,400,125                   06/272,952                   08/23/83
4,400,131                   06/297,597                   08/23/83
4,400,135                   06/251,148                   08/23/83
4,400,136                   06/323,666                   08/23/83
4,400,139                   06/258,242                   08/23/83
4,400,140                   06/227,415                   08/23/83
4,400,142                   06/260,498                   08/23/83
4,400,143                   06/258,477                   08/23/83
4,400,154                   06/339,859                   08/23/83
4,400,155                   06/317,026                   08/23/83
4,400,156                   06/322,236                   08/23/83
4,400,158                   06/286,071                   08/23/83
4,400,159                   06/267,608                   08/23/83
4,400,168                   06/308,773                   08/23/83
4,400,173                   06/331,508                   08/23/83
4,400,175                   06/305,567                   08/23/83
4,400,179                   06/272,417                   08/23/83
4,400,180                   06/272,419                   08/23/83
4,400,183                   06/313,662                   08/23/83
4,400,185                   06/381,383                   08/23/83
4,400,187                   06/338,913                   08/23/83
4,400,190                   06/306,066                   08/23/83
4,400,197                   06/276,309                   08/23/83
4,400,198                   06/283,704                   08/23/83
4,400,202                   06/330,630                   08/23/83
4,400,203                   06/220,925                   08/23/83
4,400,204                   06/244,453                   08/23/83
4,400,220                   06/358,843                   08/23/83
4,400,221                   06/436,869                   08/23/83
4,400,228                   06/393,959                   08/23/83
4,400,233                   06/441,229                   08/23/83
4,400,234                   06/368,795                   08/23/83
4,400,239                   06/315,601                   08/23/83
4,400,242                   06/355,139                   08/23/83
4,400,247                   06/261,336                   08/23/83
4,400,251                   06/270,612                   08/23/83
4,400,255                   06/278,049                   08/23/83
4,400,261                   06/308,724                   08/23/83
4,400,262                   06/380,096                   08/23/83
4,400,264                   06/429,778                   08/23/83
4,400,267                   06/289,530                   08/23/83
4,400,271                   06/291,902                   08/23/83
4,400,272                   06/271,501                   08/23/83
4,400,274                   06/277,146                   08/23/83
4,400,276                   06/229,229                   08/23/83
4,400,280                   06/345,394                   08/23/83
4,400,282                   06/216,140                   08/23/83
4,400,289                   06/346,331                   08/23/83
4,400,291                   06/229,754                   08/23/83
4,400,293                   06/316,382                   08/23/83
4,400,298                   06/293,072                   08/23/83
4,400,303                   06/241,975                   08/23/83
4,400,306                   06/392,961                   08/23/83
4,400,307                   06/275,001                   08/23/83
4,400,309                   06/330,540                   08/23/83
4,400,312                   06/376,074                   08/23/83
4,400,318                   06/318,189                   08/23/83
4,400,322                   06/274,288                   08/23/83
4,400,324                   06/288,825                   08/23/83
4,400,331                   06/342,544                   08/23/83
4,400,349                   06/389,484                   08/23/83
4,400,352                   06/269,006                   08/23/83
4,400,355                   06/327,931                   08/23/83
4,400,356                   06/344,897                   08/23/83
4,400,363                   06/253,652                   08/23/83
4,400,364                   06/284,155                   08/23/83
4,400,373                   06/331,456                   08/23/83
4,400,375                   06/324,241                   08/23/83
4,400,377                   06/355,252                   08/23/83
4,400,383                   06/413,078                   08/23/83
4,400,386                   06/318,930                   08/23/83
4,400,392                   06/382,175                   08/23/83
4,400,401                   06/305,281                   08/23/83
4,400,403                   06/256,323                   08/23/83
4,400,412                   06/344,860                   08/23/83
4,400,413                   06/283,091                   08/23/83
4,400,414                   06/313,065                   08/23/83
4,400,421                   06/448,161                   08/23/83
4,400,429                   06/394,052                   08/23/83
4,400,434                   06/322,643                   08/23/83
4,400,435                   06/283,549                   08/23/83
4,400,442                   06/282,563                   08/23/83
4,400,444                   06/384,604                   08/23/83
4,400,449                   06/296,265                   08/23/83
4,400,450                   06/286,795                   08/23/83
4,400,452                   06/334,375                   08/23/83
4,400,459                   06/375,975                   08/23/83
4,400,460                   06/375,976                   08/23/83
4,400,467                   06/251,831                   08/23/83
4,400,470                   06/225,093                   08/23/83
4,400,472                   06/310,447                   08/23/83
4,400,474                   06/371,864                   08/23/83
4,400,475                   06/443,878                   08/23/83
4,400,486                   06/409,315                   08/23/83
4,400,490                   06/340,179                   08/23/83
4,400,499                   06/335,521                   08/23/83
4,400,503                   06/316,615                   08/23/83
4,400,508                   06/319,793                   08/23/83
4,400,511                   06/375,858                   08/23/83
4,400,512                   06/220,560                   08/23/83
4,400,515                   06/237,505                   08/23/83
4,400,516                   06/260,527                   08/23/83
4,400,522                   06/374,219                   08/23/83
4,400,529                   06/360,292                   08/23/83
4,400,530                   06/243,002                   08/23/83
4,400,535                   06/223,646                   08/23/83
4,400,536                   06/233,404                   08/23/83
4,400,537                   06/369,499                   08/23/83
4,400,540                   06/366,733                   08/23/83
4,400,554                   06/362,719                   08/23/83
4,400,556                   06/276,003                   08/23/83
4,400,559                   06/388,395                   08/23/83
4,400,560                   06/242,076                   08/23/83
4,400,566                   06/361,192                   08/23/83
4,400,569                   06/315,428                   08/23/83
4,400,571                   06/417,255                   08/23/83
4,400,573                   06/404,315                   08/23/83
4,400,575                   06/224,440                   08/23/83
4,400,588                   06/273,700                   08/23/83
4,400,596                   06/339,558                   08/23/83
4,400,602                   06/250,550                   08/23/83
4,400,605                   06/318,971                   08/23/83
4,400,621                   06/230,505                   08/23/83
4,400,625                   06/325,974                   08/23/83
4,400,632                   06/306,472                   08/23/83
4,400,640                   06/378,668                   08/23/83
4,400,641                   06/369,181                   08/23/83
4,400,649                   06/282,231                   08/23/83
4,400,653                   06/361,177                   08/23/83
4,400,657                   06/325,886                   08/23/83
4,400,658                   06/393,758                   08/23/83
4,400,662                   06/317,793                   08/23/83
4,400,664                   06/267,155                   08/23/83
4,400,667                   06/224,421                   08/23/83
4,400,669                   06/305,667                   08/23/83
4,400,671                   06/222,887                   08/23/83
4,400,673                   06/333,225                   08/23/83
4,400,675                   06/318,508                   08/23/83
4,400,679                   06/304,016                   08/23/83
4,400,681                   06/237,474                   08/23/83
4,400,684                   06/297,679                   08/23/83
4,400,695                   06/297,807                   08/23/83
4,400,699                   06/245,406                   08/23/83
4,400,700                   06/271,725                   08/23/83
4,400,717                   06/256,207                   08/23/83
4,400,718                   06/270,591                   08/23/83
4,400,720                   06/271,034                   08/23/83
4,400,722                   06/261,136                   08/23/83
4,400,723                   06/314,591                   08/23/83
4,400,730                   06/227,868                   08/23/83
4,400,731                   06/239,932                   08/23/83
4,400,732                   06/332,157                   08/23/83
4,400,735                   06/282,305                   08/23/83
4,400,736                   06/277,493                   08/23/83
4,400,739                   06/267,674                   08/23/83
4,400,741                   06/254,186                   08/23/83
4,400,750                   06/305,591                   08/23/83
4,400,751                   06/239,207                   08/23/83
4,400,757                   06/285,632                   08/23/83
4,400,764                   06/265,097                   08/23/83
4,400,767                   06/279,108                   08/23/83
4,400,772                   06/221,467                   08/23/83
4,400,775                   06/238,657                   08/23/83
4,400,777                   06/269,960                   08/23/83
4,400,781                   06/228,884                   08/23/83
4,400,787                   06/215,894                   08/23/83
4,400,793                   06/350,456                   08/23/83
4,400,808                   06/294,360                   08/23/83
4,400,820                   06/430,149                   08/23/83
4,686,710                   06/906,036                   08/18/87
4,686,711                   06/895,511                   08/18/87
4,686,713                   06/935,124                   08/18/87
4,686,714                   06/724,064                   08/18/87
4,686,718                   06/715,383                   08/18/87
4,686,719                   06/734,112                   08/18/87
4,686,722                   06/596,805                   08/18/87
4,686,724                   06/828,286                   08/18/87
4,686,726                   06/870,726                   08/18/87
4,686,727                   06/740,423                   08/18/87
4,686,730                   06/882,055                   08/18/87
4,686,736                   06/832,510                   08/18/87
4,686,737                   06/770,096                   08/18/87
4,686,739                   06/866,219                   08/18/87
4,686,752                   06/734,626                   08/18/87
4,686,757                   06/819,813                   08/18/87
4,686,759                   06/649,633                   08/18/87
4,686,770                   06/821,027                   08/18/87
4,686,772                   06/866,719                   08/18/87
4,686,780                   06/789,304                   08/18/87
4,686,793                   06/877,306                   08/18/87
4,686,794                   06/720,436                   08/18/87
4,686,795                   06/829,460                   08/18/87
4,686,798                   06/747,484                   08/18/87
4,686,800                   06/823,701                   08/18/87
4,686,802                   06/862,106                   08/18/87
4,686,803                   06/677,545                   08/18/87
4,686,810                   06/723,966                   08/18/87
4,686,812                   06/756,663                   08/18/87
4,686,818                   06/790,623                   08/18/87
4,686,820                   06/704,429                   08/18/87
4,686,828                   06/786,862                   08/18/87
4,686,829                   06/865,585                   08/18/87
4,686,830                   06/781,758                   08/18/87
4,686,831                   06/866,268                   08/18/87
4,686,833                   06/889,308                   08/18/87
4,686,836                   06/805,091                   08/18/87
4,686,841                   06/785,558                   08/18/87
4,686,842                   06/866,121                   08/18/87
4,686,844                   06/847,384                   08/18/87
4,686,847                   06/787,264                   08/18/87
4,686,850                   06/845,970                   08/18/87
4,686,851                   06/802,042                   08/18/87
4,686,853                   06/745,668                   08/18/87
4,686,856                   06/851,262                   08/18/87
4,686,857                   06/585,257                   08/18/87
4,686,858                   06/878,364                   08/18/87
4,686,859                   06/926,309                   08/18/87
4,686,864                   06/824,377                   08/18/87
4,686,868                   06/871,096                   08/18/87
4,686,875                   06/798,375                   08/18/87
4,686,882                   06/831,334                   08/18/87
4,686,883                   06/872,887                   08/18/87
4,686,887                   06/839,540                   08/18/87
4,686,898                   06/820,705                   08/18/87
4,686,901                   06/915,802                   08/18/87
4,686,903                   06/725,960                   08/18/87
4,686,904                   06/869,317                   08/18/87
4,686,909                   06/783,941                   08/18/87
4,686,911                   06/848,246                   08/18/87
4,686,912                   06/723,547                   08/18/87
4,686,914                   06/828,580                   08/18/87
4,686,925                   06/804,829                   08/18/87
4,686,931                   06/795,052                   08/18/87
4,686,933                   06/867,627                   08/18/87
4,686,942                   06/751,537                   08/18/87
4,686,944                   06/853,755                   08/18/87
4,686,947                   06/836,243                   08/18/87
4,686,951                   06/747,838                   08/18/87
4,686,958                   06/808,986                   08/18/87
4,686,959                   06/638,191                   08/18/87
4,686,964                   06/830,248                   08/18/87
4,686,966                   06/850,853                   08/18/87
4,686,971                   06/673,131                   08/18/87
4,686,983                   06/849,570                   08/18/87
4,686,984                   06/710,717                   08/18/87
4,686,989                   06/734,842                   08/18/87
4,686,991                   06/745,212                   08/18/87
4,686,993                   06/759,221                   08/18/87
4,686,994                   06/597,358                   08/18/87
4,686,995                   06/828,298                   08/18/87
4,686,996                   06/892,600                   08/18/87
4,686,997                   06/930,163                   08/18/87
4,686,998                   06/797,164                   08/18/87
4,687,003                   06/859,652                   08/18/87
4,687,015                   06/643,747                   08/18/87
4,687,020                   06/735,466                   08/18/87
4,687,023                   06/849,961                   08/18/87
4,687,028                   06/853,954                   08/18/87
4,687,041                   06/562,540                   08/18/87
4,687,043                   06/840,803                   08/18/87
4,687,044                   06/730,399                   08/18/87
4,687,046                   06/835,786                   08/18/87
4,687,049                   06/930,675                   08/18/87
4,687,051                   06/769,453                   08/18/87
4,687,054                   06/714,564                   08/18/87
4,687,056                   06/652,684                   08/18/87
4,687,057                   06/765,995                   08/18/87
4,687,058                   06/866,488                   08/18/87
4,687,059                   06/842,517                   08/18/87
4,687,060                   06/874,075                   08/18/87
4,687,061                   06/938,891                   08/18/87
4,687,062                   06/600,335                   08/18/87
4,687,070                   06/893,715                   08/18/87
4,687,075                   07/014,857                   08/18/87
4,687,081                   06/751,741                   08/18/87
4,687,084                   06/757,799                   08/18/87
4,687,088                   06/830,968                   08/18/87
4,687,089                   06/769,392                   08/18/87
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