Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 10/23/98

Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

4,566,125        06/447,868        12/08/82        01/21/86       10/26/98
4,574,277        06/527,944        08/30/83        03/04/86       10/26/98
4,588,762        06/673,552        11/20/84        05/13/86       10/29/98
4,757,022        07/122,395        11/19/87        07/12/88       10/23/98
4,764,088        07/040,858        04/21/87        08/16/88       10/26/98
4,828,979        06/669,334        11/08/84        05/09/89       10/26/98
4,833,698        06/891,597        08/01/86        05/23/89       10/23/98
4,840,571        07/132,706        12/11/87        06/20/89       10/26/98
4,890,694        07/277,638        11/29/88        01/02/90       10/26/98
4,901,048        07/323,674        03/15/89        02/13/90       10/29/98
4,926,397        07/434,338        11/13/89        05/15/90       10/29/98
4,934,466        07/314,556        02/23/89        06/19/90       10/29/98
4,935,895        07/236,986        08/26/88        06/19/90       10/26/98
4,944,802        07/245,330        09/16/88        07/31/90       10/26/98
5,127,544        07/509,318        04/13/90        07/07/92       10/26/98
5,130,695        07/611,166        11/08/90        07/14/92       10/26/98
5,134,260        07/776,898        10/16/91        07/28/92       10/26/98
5,135,232        07/694,375        05/01/91        08/04/92       10/23/98
5,177,694        07/684,905        04/30/91        01/05/93       10/23/98
5,201,731        07/721,032        06/26/91        04/13/93       10/29/98
5,255,666        07/257,506        10/13/88        10/26/93       10/26/98
5,279,259        07/741,847        08/07/91        01/18/94       10/23/98
5,293,518        07/746,602        08/19/91        03/08/94       10/26/98
5,298,687        08/043,990        04/07/93        03/29/94       10/26/98
5,301,826        07/926,848        08/06/92        04/12/94       10/29/98
5,313,005        08/120,644        09/13/93        05/17/94       10/26/98
5,320,596        07/990,160        12/14/92        06/14/94       10/29/98