Patents Reinstated Due to the Acceptance of a
                       Late Maintenance Fee From 9/25/98
   
Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

Re. 34,332       07/703,390        05/21/91        08/03/93       09/30/98
4,436,372        06/231,662        02/05/81        03/13/84       09/30/98
4,460,166        06/464,003        02/04/83        07/17/84       09/29/98
4,474,107        06/474,794        03/14/83        10/02/84       09/30/98
4,539,780        06/555,967        11/29/83        09/10/85       09/30/98
4,578,754        06/596,877        04/05/84        03/25/86       09/29/98
4,586,902        06/655,025        09/26/84        05/06/86       09/28/98
4,723,886        06/885,452        07/14/86        02/09/88       09/30/98
4,757,022        07/122,395        11/19/87        07/12/88       09/30/98
4,788,109        07/090,532        08/28/87        11/29/88       09/30/98
4,799,547        07/150,471        01/29/88        01/24/89       09/25/98
4,803,860        07/077,241        07/24/87        02/14/89       09/30/98
4,833,483        07/218,113        07/12/88        05/23/89       09/30/98
4,839,906        07/196,235        05/20/88        06/13/89       09/30/98
4,855,228        07/095,143        09/11/87        08/08/89       09/29/98
4,861,435        07/147,750        01/25/88        08/29/89       09/28/98
4,871,628        07/257,838        10/14/88        10/03/89       09/28/98
4,888,804        07/193,900        05/12/88        12/19/89       09/30/98
4,894,011        07/265,942        11/02/88        01/16/90       09/30/98
4,896,520        07/237,383        08/29/88        01/30/90       09/30/98
4,902,361        06/827,911        02/10/86        02/20/90       09/30/98
4,908,799        07/316,538        02/27/89        03/13/90       09/25/98
4,912,797        07/228,139        08/04/88        04/03/90       09/30/98
4,917,841        07/254,732        10/07/88        04/17/90       09/30/98
4,920,765        07/295,558        01/11/89        05/01/90       09/30/98
5,116,224        07/542,889        06/25/90        05/26/92       09/29/98
5,119,979        07/612,096        11/09/90        06/09/92       09/29/98
5,123,267        07/706,177        05/28/91        06/23/92       09/29/98
5,133,261        07/660,411        02/22/91        07/28/92       09/28/98
5,143,415        07/708,496        05/31/91        09/01/92       09/29/98
5,156,202        07/754,324        09/04/91        10/20/92       09/30/98
5,157,537        07/650,559        02/01/91        10/20/92       09/30/98
5,158,648        07/732,350        07/17/91        10/27/92       09/30/98
5,181,956        07/702,537        05/20/91        01/26/93       09/30/98
5,182,791        07/739,093        08/01/91        01/26/93       09/30/98
5,188,116        07/662,578        02/28/91        02/23/93       09/25/98
5,195,702        07/683,596        04/09/91        03/23/93       09/30/98
5,196,667        07/466,316        06/27/90        03/23/93       09/30/98
5,214,492        07/739,896        08/02/91        05/25/93       09/28/98
5,214,582        07/647,774        01/30/91        05/25/93       09/28/98
5,216,251        07/778,737        10/18/91        06/01/93       09/29/98
5,233,742        07/905,356        06/29/92        08/10/93       09/29/98
5,235,805        07/851,167        03/12/92        08/17/93       09/30/98
5,237,906        07/782,422        10/25/91        08/24/93       09/28/98
5,238,328        07/824,071        01/23/92        08/24/93       09/30/98
5,240,042        07/954,820        10/01/92        08/31/93       09/30/98
5,244,718        07/860,315        03/30/92        09/14/93       09/30/98
5,255,456        07/173,431        03/25/88        10/26/93       09/30/98         
5,263,150        07/511,636        04/20/90        11/16/93       09/29/98
5,267,746        07/899,892        06/17/92        12/07/93       09/30/98
5,279,351        07/976,698        11/13/92        01/18/94       09/30/98
5,279,955        07/663,120        03/01/91        01/18/94       09/28/98
5,280,982        07/957,768        10/16/92        01/25/94       09/30/98
5,282,921        07/899,419        06/16/92        02/01/94       09/30/98
5,285,211        07/939,260        09/02/92        02/08/94       09/30/98
5,286,290        07/868,942        04/16/92        02/15/94       09/30/98
5,290,050        07/938,424        08/31/92        03/01/94       09/25/98
5,291,588        07/455,818        12/18/89        03/01/94       09/25/98
5,298,887        07/771,210        10/04/91        03/29/94       09/29/98
5,299,605        07/888,560        05/22/92        04/05/94       09/25/98
5,300,540        07/904,171        06/24/92        04/05/94       09/30/98
5,307,822        07/986,003        12/04/92        05/03/94       09/30/98
5,308,988        07/883,984        05/18/92        05/03/94       09/30/98
5,309,127        07/991,558        12/11/92        05/03/94       09/30/98
5,309,531        07/975,393        11/12/92        05/03/94       09/30/98
5,313,209        08/152,601        11/12/93        05/17/94       09/30/98