Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 02/27/98
   
Patent Number    Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

                 08/129,708        09/30/93        00/00/00       03/04/98
4,371,306        06/237,441        02/23/81        02/01/83       03/03/98
4,463,788        06/502,675        06/09/83        08/07/84       03/04/98
4,681,576        06/839,943        03/17/86        07/21/87       02/27/98
4,681,839        06/422,038        09/23/82        07/21/87       03/04/98
4,738,691        07/001,140        01/07/87        04/19/88       02/27/98
4,744,524        07/032,538        04/01/87        05/17/88       02/27/98
4,786,246        07/086,641        08/18/87        11/22/88       02/27/98
4,813,520        07/082,359        08/06/87        03/21/89       02/27/98
4,827,107        07/091,435        08/31/87        05/02/89       02/27/98
4,866,164        06/843,441        03/24/86        09/12/89       02/27/98
4,869,454        07/098,625        09/21/87        09/26/89       03/03/98
4,882,692        06/925,278        10/30/86        11/21/89       02/27/98
5,018,230        07/508,165        04/12/90        05/28/91       03/04/98
5,067,601        07/418,795        10/03/89        11/26/91       03/02/98
5,073,589        07/454,511        12/21/89        12/17/91       03/02/98
5,156,042        07/373,237        06/28/89        10/20/92       02/27/98
5,160,100        07/724,191        07/01/91        11/03/92       02/27/98
5,172,599        07/700,462        05/15/91        12/22/92       03/02/98
5,175,971        07/716,857        06/17/91        01/05/93       03/02/98
5,198,116        07/832,941        02/10/92        03/30/93       02/27/98
5,209,368        07/896,115        06/09/92        05/11/93       03/02/98
5,222,532        07/821,795        01/16/92        06/29/93       03/04/98
5,223,793        07/693,142        04/29/91        06/29/93       02/27/98
5,224,333        07/825,345        01/24/92        07/06/93       02/27/98
5,236,371        07/965,858        10/23/92        08/17/93       03/05/98
5,254,476        07/893,689        06/05/92        10/19/93       02/27/98
5,260,910        07/961,532        10/15/92        11/09/93       02/27/98

                 Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 03/06/98

Patent Number    Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date   

4,487,347        06/531,405        09/12/83        12/11/84       03/10/98
4,491,322        06/512,584        07/11/83        01/01/85       03/11/98
4,508,267        06/482,349        04/05/83        04/02/85       03/09/98
4,563,981        06/670,054        11/09/84        01/14/86       03/11/98
4,596,371        06/615,727        05/31/84        06/24/86       03/10/98
4,659,738        06/702,114        02/15/85        04/21/87       03/10/98
4,736,950        06/810,779        12/19/85        04/12/88       03/11/98
4,797,779        07/104,685        10/05/87        01/10/89       03/11/98
4,825,542        07/009,389        01/30/87        05/02/89       03/09/98
4,919,316        07/287,098        12/20/88        04/24/90       03/12/98
5,062,185        07/619,598        11/29/90        11/05/91       03/06/98
5,084,044        07/380,200        07/14/89        01/28/92       03/12/98
5,094,182        07/673,745        03/21/91        03/10/92       03/11/98
5,124,058        07/626,137        12/12/90        06/23/92       03/11/98
5,206,900        07/708,722        05/31/91        04/27/93       03/12/98
5,227,160        07/219,401        07/15/88        07/13/93       03/11/98
5,228,229        07/761,342        09/06/91        07/20/93       03/06/98
5,240,086        07/880,684        05/08/92        08/31/93       03/09/98
5,253,377        07/849,515        03/11/92        10/19/93       03/12/98
5,272,838        07/823,353        01/21/92        12/28/93       03/09/98