Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 10/02/98

Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

4,460,052        06/291,261        08/10/81        07/17/84       10/08/98
4,528,643        06/456,730        01/10/83        07/09/85       10/05/98
4,837,049        06/875,334        06/17/86        06/06/89       10/02/98
4,852,909        07/077,897        07/27/87        08/01/89       10/06/98
4,887,208        07/134,932        12/18/87        12/12/89       10/08/98
4,898,313        07/197,876        05/24/88        02/06/90       10/08/98
4,903,456        07/276,606        11/28/88        02/27/90       10/08/98
4,903,457        07/276,607        11/28/88        02/27/90       10/06/98
4,905,156        07/161,947        02/29/88        02/27/90       10/05/98
4,914,151        07/329,985        03/29/89        04/03/90       10/06/98
4,914,606        07/176,521        04/01/88        04/03/90       10/06/98
4,916,626        07/174,756        03/29/88        04/10/90       10/08/98
4,921,262        07/240,825        09/06/88        05/01/90       10/06/98
4,935,815        07/372,754        06/29/89        06/19/90       10/08/98
5,269,268        08/037,227        03/26/93        12/14/93       10/06/98
5,287,892        08/034,497        03/19/93        02/22/94       10/05/98
5,293,523        08/083,687        06/25/93        03/08/94       10/08/98
5,304,171        08/012,789        02/02/93        04/19/94       10/05/98
5,306,052        07/990,575        12/15/92        04/26/94       10/07/98
5,320,362        08/116,507        09/07/93        06/14/94       10/05/98