Patent Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 06/25/99

Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

Re. 34,755       07/940,425        09/04/92        10/11/94       06/25/99
Re. 34,811       07/940,572        09/04/92        12/27/94       06/25/99
4,642,762        06/614,219        05/25/84        02/10/87       06/28/99
4,795,747        07/062,412        06/16/87        01/03/89       06/28/99
4,838,310        07/174,053        03/28/88        06/13/89       06/28/99
4,840,584        07/152,819        02/05/88        06/20/89       06/28/99
4,879,453        07/060,739        06/10/87        11/07/89       06/28/99
4,886,258        07/235,621        08/24/88        12/12/89       06/29/99
4,931,228        07/333,982        04/05/89        06/05/90       06/25/99
4,936,827        07/179,985        04/11/88        06/26/90       06/29/99
4,940,216        07/247,109        09/20/88        07/10/90       06/25/99
4,959,635        07/352,757        05/16/89        09/25/90       06/25/99
4,975,581        07/369,217        06/21/89        12/04/90       06/30/99
4,976,343        07/411,277        09/22/89        12/11/90       06/28/99
5,232,224        07/932,713        08/18/92        08/03/93       06/25/99
5,268,460        07/777,151        10/16/91        12/07/93       06/28/99
5,270,205        08/040,834        03/31/93        12/14/93       06/28/99
5,281,109        08/008,558        01/22/93        01/25/94       06/28/99
5,298,132        08/037,159        03/25/93        03/29/94       06/28/99
5,300,330        08/112,273        08/27/93        04/05/94       06/28/99
5,303,035        07/878,427        05/04/92        04/12/94       06/28/99
5,308,208        08/049,680        04/16/93        05/03/94       07/01/99
5,310,184        07/976,261        11/13/92        05/10/94       06/28/99
5,322,640        08/070,598        06/01/93        06/21/94       06/28/99
5,324,478        07/931,656        08/17/92        06/28/94       06/28/99
5,340,141        08/077,515        06/17/93        08/23/94       06/28/99
5,347,495        08/054,141        04/30/93        09/13/94       06/30/99
5,359,155        08/036,701        03/25/93        10/25/94       06/28/99
5,361,306        08/021,209        02/23/93        11/01/94       06/28/99
5,362,499        08/082,095        06/24/93        11/08/94       07/01/99
5,384,926        08/138,732        10/20/93        01/31/95       06/29/99
5,385,326        08/088,796        07/08/93        01/31/95       06/28/99
5,388,231        08/226,398        04/12/94        02/07/95       06/28/99
5,388,255        07/810,245        12/19/91        02/07/95       06/28/99
5,389,309        07/632,011        12/21/90        02/14/95       06/28/99
5,395,182        08/059,300        05/11/93        03/07/95       06/28/99
5,396,269        07/838,348        02/20/92        03/07/95       06/28/99
5,398,319        07/943,981        09/11/92        03/14/95       06/28/99
5,398,747        07/952,244        09/28/92        03/21/95       06/25/99
5,399,055        08/144,706        10/28/93        03/21/95       06/28/99
5,402,274        07/964,294        10/21/92        03/28/95       06/25/99
5,412,492        07/788,029        11/05/91        05/02/95       06/28/99