PATENTS REINSTATED DUE TO THE ACCEPTANCE OF A LATE
                         MAINTENANCE FEE FROM 7/21/95

Patent Number   Serial Number   Filing Date   Issue Date   Granted Date

Re. 33,717        07/527,957       05/24/90     10/15/91       07/26/95
4,367,198         06/275,420       06/19/81     01/04/83       07/27/95
4,568,028         06/532,613       09/15/83     02/04/86       07/28/95
4,584,639         06/565,194       12/23/83     04/22/86       07/24/95
4,629,987         06/530,411       09/08/83     12/16/86       07/28/95
4,631,482         06/658,586       10/09/84     12/23/86       07/26/95
4,646,672         06/567,228       12/30/83     03/03/87       07/24/95
4,650,305         06/810,780       12/19/85     03/17/87       07/28/95
4,659,608         06/494,685       05/17/83     04/21/87       07/26/95
4,670,995         06/784,512       10/04/85     06/09/87       07/26/95
4,722,268         06/818,098       01/10/86     02/02/88       07/25/95
4,842,925         07/162,807       03/01/88     06/27/89       07/28/95
4,907,601         07/250,639       09/29/88     03/13/90       07/27/95
4,910,358         07/279,781       12/05/88     03/20/90       07/26/95
4,914,855         07/335,328       04/10/89     04/10/90       07/26/95
4,939,799         07/344,677       04/28/89     07/10/90       07/26/95
4,941,458         06/914,784       10/03/86     07/17/90       07/26/95
4,962,777         06/736,645       05/21/85     10/16/90       07/26/95
4,975,556         07/285,591       12/16/88     12/04/90       07/21/95
5,002,513         07/355,175       05/22/89     03/26/91       07/26/95
5,002,786         07/415,403       09/29/89     03/26/91       07/28/95
5,015,906         07/431,385       11/03/89     05/14/91       07/26/95


              PATENTS REINSTATED DUE TO THE ACCEPTANCE OF A LATE
                         MAINTENANCE FEE FROM 7/28/95


Patent Number   Serial Number   Filing Date   Issue Date   Granted Date

4,604,558        06/758,731        07/25/85     08/05/86       08/03/95
4,620,978        06/652,067        09/19/84     11/04/86       07/31/95
4,636,138        06/443,156        11/19/82     01/13/87       07/31/95
4,640,328        06/610,831        05/16/84     02/03/87       07/31/95
4,662,764        06/777,133        09/18/85     05/05/87       07/31/95
4,830,392        07/001,055        01/07/87     05/16/89       07/31/95
4,832,395        07/159,184        02/23/88     05/23/89       08/02/95
4,837,829        07/106,936        10/08/87     06/06/89       07/31/95
4,837,999        07/134,466        12/17/87     06/13/89       07/31/95
4,842,929        07/162,556        03/01/88     06/27/89       07/31/95
4,847,781        06/910,655        09/23/86     07/11/89       07/31/95
4,847,782        06/910,654        09/23/86     07/11/89       07/31/95
4,851,001        07/141,553        01/07/88     07/25/89       07/31/95
4,873,448        07/042,736        04/27/87     10/10/89       08/03/95
4,903,352        07/299,375        01/23/89     02/27/90       07/31/95
4,957,325        07/359,869        05/31/89     09/18/90       07/31/95
4,958,673        07/014,026        02/12/87     09/25/90       07/31/95
4,984,913        07/217,459        07/11/88     01/15/91       07/31/95
4,994,418        07/453,158        12/18/89     02/19/91       07/31/95
4,996,616        07/340,335        04/19/89     02/26/91       07/31/95
5,006,843        07/517,430        05/02/90     04/09/91       08/03/95