Patent Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 04/30/99

Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

4,489,850        06/498,838        05/27/83        12/25/84       05/04/99
4,784,273        07/082,285        08/06/87        11/15/88       05/06/99
4,862,817        07/147,170        01/22/88        09/05/89       05/04/99
4,911,060        07/325,606        03/20/89        03/27/90       04/30/99
4,918,756        07/278,214        11/30/88        04/24/90       04/30/99
4,924,739        06/623,361        06/22/84        05/15/90       05/04/99
4,958,520        07/431,366        11/01/89        09/25/90       04/30/99
4,972,956        07/326,362        03/21/89        11/27/90       04/30/99
5,231,689        07/852,681        03/17/92        07/27/93       04/30/99
5,245,571        07/799,203        11/27/91        09/14/93       04/30/99
5,301,436        07/944,457        09/14/92        04/12/94       05/04/99
5,313,210        08/021,310        02/23/93        05/17/94       04/30/99
5,328,380        08/031,199        03/12/93        07/12/94       05/04/99
5,356,105        08/158,431        11/29/93        10/18/94       04/30/99
5,360,955        07/931,691        08/18/92        11/01/94       05/04/99
5,375,941        08/113,926        08/17/93        12/27/94       04/30/99