Patents Reinstated Due to the Acceptance of a
                       Late Maintenance Fee From 1/17/97


Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

4,492,299        06/398,135        07/14/82        01/08/85       01/22/97
4,662,786        06/783,679        10/03/85        05/05/87       01/21/97
4,667,920        06/787,074        10/15/85        05/26/87       01/22/97
4,775,936        06/846,225        03/31/86        10/04/88       01/23/97
4,826,246        07/081,193        08/04/87        05/02/89       01/21/97
4,964,188        07/376,415        07/06/89        10/23/90       01/23/97
4,978,133        07/428,959        10/30/89        12/18/90       01/21/97
5,047,928        07/292,927        01/03/89        09/10/91       01/23/97
5,128,100        07/746,159        08/14/91        07/07/92       01/21/97
5,145,549        07/747,791        08/19/91        09/08/92       01/21/97
5,145,807        07/545,794        06/29/90        09/08/92       01/21/97


                 Patents Reinstated Due to the Acceptance of a
                       Late Maintenance Fee From 1/24/97

Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

4,378,520        06/232,695        02/09/81        03/29/83       01/31/97
4,402,770        06/314,325        10/23/81        09/06/83       01/27/97
4,414,653        06/400,912        07/22/82        11/08/83       01/28/97
4,458,260        06/323,200        11/20/81        07/03/84       01/30/97
4,463,368        06/323,199        11/20/81        07/31/84       01/30/97
4,469,330        06/337,881        01/07/82        09/04/84       01/29/97
4,477,431        06/225,005        01/14/81        10/16/84       01/30/97
4,651,536        06/570,233        08/19/83        03/24/87       01/31/97
4,675,924        06/836,726        03/06/86        06/30/87       01/27/97
4,685,145        06/679,622        12/07/84        08/04/87       01/27/97
4,685,446        06/582,118        02/21/84        08/11/87       01/30/97
4,688,276        06/836,828        03/06/86        08/25/87       01/30/97
4,700,209        06/792,915        10/30/85        10/13/87       01/31/97
4,716,533        06/726,263        04/23/85        12/29/87       01/27/97
4,732,679        06/905,972        09/11/86        03/22/88       01/29/97
4,746,438        07/103,462        10/01/87        05/24/88       01/31/97
4,759,623        06/872,527        06/10/86        07/26/88       01/27/97
4,778,283        06/947,717        12/30/86        10/18/88       01/27/97
4,942,395        07/088,579        08/24/87        07/17/90       01/24/97
4,960,017        07/372,831        06/29/89        10/02/90       01/31/97
4,970,625        07/344,457        04/28/89        11/13/90       01/31/97
4,977,775        07/456,725        12/26/89        12/18/90       01/27/97
4,986,274        07/453,123        12/04/89        01/22/91       01/30/97
4,989,605        07/331,181        03/31/89        02/05/91       01/29/97
5,002,058        07/340,050        04/18/89        03/26/91       01/31/97
5,006,936        07/268,614        11/02/88        04/09/91       01/28/97
5,028,492        07/492,149        03/13/90        07/02/91       01/24/97
5,057,385        07/627,406        12/14/90        10/15/91       01/28/97
5,060,262        07/519,856        05/07/90        10/22/91       01/27/97
5,060,301        07/561,949        08/02/90        10/22/91       01/24/97
5,062,731        07/476,741        02/08/90        11/05/91       01/31/97
5,088,229        07/563,530        08/06/90        02/18/92       01/31/97
5,099,678        07/559,667        07/30/90        03/31/92       01/30/97
5,104,735        07/354,019        05/08/89        04/14/92       01/27/97
5,114,504        07/609,377        11/05/90        05/19/92       01/29/97
5,114,709        07/713,875        06/12/91        05/19/92       01/29/97
5,125,190        07/524,130        05/16/90        06/30/92       01/27/97
5,131,685        07/782,629        10/25/91        07/21/92       01/27/97
5,132,671        07/439,278        11/20/89        07/21/92       01/27/97
5,133,428        07/680,524        04/04/91        07/28/92       01/28/97
5,135,537        07/639,185        01/09/91        08/04/92       01/27/97
5,137,669        07/695,924        05/24/91        08/11/92       01/27/97
5,147,110        07/617,832        11/26/90        09/15/92       01/31/97
5,149,222        07/771,652        10/04/91        09/22/92       01/31/97
5,158,979        07/340,344        04/19/89        10/27/92       01/31/97
5,552,995        08/158,125        11/24/93        09/03/96       01/31/97