Patents Reinstated Due to the Acceptance of a
                       Late Maintenance Fee From 4/25/97

Patent Number    Serial Number  Filing Date      Issue Date    Granted Date

Re. 32,734       06/920,227        10/16/86        08/23/88        04/25/97
4,426,021        06/318,600        11/05/81        01/17/84        04/25/97
4,771,689        06/779,474        09/25/85        09/20/88        04/29/97
4,780,544        06/881,415        07/02/86        10/25/88        04/25/97
4,788,253        07/000,627        04/17/87        11/29/88        04/25/97
4,799,607        06/920,030        10/16/86        01/24/89        04/25/97
4,801,803        07/027,197        03/17/87        01/31/89        04/30/97
4,816,646        07/170,903        03/21/88        03/28/89        04/30/97
4,957,230        07/410,828        09/22/89        09/18/90        04/25/97
4,982,907        07/187,286        04/28/88        01/08/91        04/25/97
4,998,737        07/398,172        08/23/89        03/12/91        04/29/97
5,002,280        07/502,780        04/02/90        03/26/91        04/29/97
5,002,633        07/473,230        01/31/90        03/26/91        04/25/97
5,003,078        07/352,327        05/16/89        03/26/91        04/25/97
5,082,626        07/230,303        08/08/88        01/21/92        04/30/97
5,124,892        07/624,024        12/07/90        06/23/92        04/25/97
5,133,123        07/584,733        09/19/90        07/28/92        04/25/97
5,133,428        07/680,524        04/04/91        07/28/92        04/28/97


                 Patents Reinstated Due to the Acceptance of a
                       Late Maintenance Fee From 5/02/97

Patent Number    Serial Number  Filing Date      Issue Date    Granted Date

4,523,913        06/545,152        10/25/83        06/18/85        05/07/97
4,619,486        06/618,492        06/08/84        10/28/86        05/09/97
4,744,069        06/829,066        02/13/86        05/10/88        05/05/97
4,881,280        07/279,431        12/02/88        11/21/89        05/05/97
5,117,834        07/563,106        08/06/90        06/02/92        05/07/97
5,130,208        07/696,613        05/07/91        07/14/92        05/07/97
5,159,654        07/782,557        10/25/91        10/27/92        05/09/97