Patents Reinstated Due to the Acceptance of a
                       Late Maintenance Fee From 1/31/97

Patent Number    Serial Number    Filing Date    Issue Date   Granted Date

4,356,296        06/237,838        02/25/81        10/26/82       02/03/97
4,378,520        06/232,695        02/09/81        03/29/83       01/31/97
4,463,438        06/329,707        12/11/81        07/31/84       02/03/97
4,477,431        06/225,005        01/14/81        10/16/84       02/06/97
4,645,465        06/664,238        10/24/84        02/24/87       02/05/97
4,651,536        06/570,233        08/19/83        03/24/87       01/31/97
4,652,095        06/780,411        09/26/85        03/24/87       02/03/97
4,700,209        06/792,915        10/30/85        10/13/87       01/31/97
4,721,010        06/939,251        12/05/86        01/26/88       02/05/97
4,722,895        06/654,213        09/25/84        02/02/88       02/03/97
4,746,438        07/103,462        10/01/87        05/24/88       01/31/97
4,960,017        07/372,831        06/29/89        10/02/90       01/31/97
4,970,625        07/344,457        04/28/89        11/13/90       01/31/97
5,002,058        07/340,050        04/18/89        03/26/91       01/31/97
5,062,361        07/557,406        07/23/90        11/05/91       02/03/97
5,062,731        07/476,741        02/08/90        11/05/91       01/31/97
5,070,650        07/600,914        10/22/90        12/10/91       02/03/97
5,084,046        07/344,385        04/28/89        01/28/92       02/05/97
5,088,229        07/563,530        08/06/90        02/18/92       01/31/97
5,103,920        07/546,440        06/29/90        04/14/92       02/03/97
5,147,110        07/617,832        11/26/90        09/15/92       01/31/97
5,149,222        07/771,652        10/04/91        09/22/92       01/31/97
5,158,979        07/340,344        04/19/89        10/27/92       01/31/97