Patent Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 02/19/99

Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

4,526,324        06/586,115        03/05/84        07/02/85       02/22/99
4,549,539        06/507,106        06/23/83        10/29/85       02/22/99
4,600,646        06/640,821        08/15/84        07/15/86       02/23/99
4,894,228        07/217,824        07/12/88        01/16/90       02/22/99
4,919,536        07/203,360        06/06/88        04/24/90       2/23/99
5,125,742        07/558,076        07/25/90        06/30/92       02/25/99
5,134,831        07/581,314        09/12/90        08/04/92       02/22/99
5,191,339        07/847,155        03/05/92        03/02/93       02/23/99
5,294,275        07/920,450        08/26/92        03/15/94       02/23/99
5,297,914        07/892,548        06/01/92        03/29/94       02/23/99
5,303,642        08/086,933        07/02/93        04/19/94       02/22/99
5,308,193        07/669,774        03/15/91        05/03/94       02/23/99
5,315,214        07/896,152        06/10/92        05/24/94       02/23/99
5,331,208        07/924,316        08/03/92        07/19/94       02/23/99
5,625,044        08/358,188        12/16/94        04/29/97       02/23/99