Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 04/28/00

Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

4,604,602        06/722,596        04/16/85        08/05/86       05/03/00
4,607,180        06/551,630        11/14/83        08/19/86       05/01/00
4,652,763        06/717,328        03/29/85        03/24/87       04/28/00
4,660,297        06/793,984        11/01/85        04/28/87       05/01/00
4,669,157        06/700,412        02/11/85        06/02/87       04/28/00
4,676,639        06/821,349        01/22/86        06/30/87       04/28/00
4,708,063        06/878,503        06/23/86        11/24/87       05/01/00
4,715,028        06/874,118        06/13/86        12/22/87       05/01/00
4,716,832        06/908,742        09/18/86        01/05/88       05/01/00
4,744,221        07/068,486        06/29/87        05/17/88       05/03/00
4,889,329        07/238,908        08/31/88        12/26/89       04/28/00
4,899,732        07/240,032        09/02/88        02/13/90       04/28/00
4,951,575        07/363,875        06/09/89        08/28/90       05/01/00
4,968,568        07/416,685        10/03/89        11/06/90       05/03/00
4,972,505        07/280,488        12/06/88        11/20/90       05/04/00
4,979,323        07/419,342        10/10/89        12/25/90       05/02/00
4,987,962        07/202,888        06/03/88        01/29/91       05/04/00
4,992,267        07/187,605        04/28/88        02/12/91       04/28/00
4,999,920        07/363,681        06/09/89        03/19/91       05/01/00
5,011,142        07/438,097        11/20/89        04/30/91       05/01/00
5,037,097        07/233,228        08/18/88        08/06/91       05/02/00
5,044,921        07/475,362        02/05/90        09/03/91       05/02/00
5,062,850        07/465,419        01/16/90        11/05/91       05/02/00
5,073,182        07/489,858        03/05/90        12/17/91       05/01/00
5,078,969        07/450,815        12/14/89        01/07/92       05/02/00
5,082,572        07/577,365        09/05/90        01/21/92       04/28/00
5,083,610        07/514,121        04/25/90        01/28/92       04/28/00
5,087,375        07/299,979        01/23/89        02/11/92       05/01/00
5,089,191        07/562,924        08/06/90        02/18/92       05/01/00
5,092,364        07/717,698        06/20/91        03/03/92       05/03/00
5,298,423        07/799,479        11/14/91        03/29/94       05/03/00
5,318,258        07/954,311        09/30/92        06/07/94       04/28/00
5,344,496        07/976,601        11/16/92        09/06/94       05/02/00
5,347,546        07/874,795        04/28/92        09/13/94       04/28/00
5,374,246        08/013,579        02/04/93        12/20/94       05/03/00
5,375,203        08/195,332        02/14/94        12/20/94       04/28/00
5,378,214        07/898,416        06/15/92        01/03/95       04/28/00
5,378,343        08/003,229        01/11/93        01/03/95       05/03/00
5,388,575        07/950,897        09/25/92        02/14/95       05/02/00
5,424,006        08/202,001        02/25/94        06/13/95       04/28/00
5,435,549        08/166,526        12/14/93        07/25/95       05/04/00
5,435,878        07/678,255        04/18/91        07/25/95       05/03/00
5,440,912        08/162,711        12/06/93        08/15/95       04/28/00
5,464,240        08/189,590        01/31/94        11/07/95       04/28/00
5,469,695        08/165,028        12/09/93        11/28/95       05/04/00
5,479,637        07/984,431        02/25/93        12/26/95       04/28/00
5,487,441        08/061,844        05/14/93        01/30/96       05/04/00


                 Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 05/05/00

Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

4,577,705        06/602,771        04/23/84        03/25/86       05/08/00
4,587,777        06/681,352        12/13/84        05/13/86       05/08/00
4,614,666        06/699,028        02/07/85        09/30/86       05/05/00
4,638,357        06/572,445        01/20/84        01/20/87       05/05/00
4,650,786        06/662,588        10/19/84        03/17/87       05/08/00
4,714,242        06/842,622        03/21/86        12/22/87       05/10/00
4,714,623        06/829,047        02/13/86        12/22/87       05/08/00
4,799,881        07/082,045        08/05/87        01/24/89       05/10/00
4,837,999        07/134,466        12/17/87        06/13/89       05/10/00
4,905,709        07/298,058        01/17/89        03/06/90       05/05/00
4,917,832        07/310,061        02/10/89        04/17/90       05/08/00
4,962,178        07/266,555        11/03/88        10/09/90       05/08/00
4,991,472        07/267,081        11/04/88        02/12/91       05/08/00
5,012,875        07/154,492        02/05/88        05/07/91       05/11/00
5,027,748        07/290,702        12/27/88        07/02/91       05/11/00
5,038,556        07/481,341        02/16/90        08/13/91       05/10/00
5,054,839        07/576,357        08/31/90        10/08/91       05/08/00
5,058,343        07/375,368        07/03/89        10/22/91       05/05/00
5,066,294        07/527,140        05/22/90        11/19/91       05/08/00
5,083,486        07/244,327        09/15/88        01/28/92       05/10/00
5,083,795        07/599,496        10/18/90        01/28/92       05/11/00
5,099,683        07/527,049        05/22/90        03/31/92       05/08/00
5,221,457        07/763,696        09/23/91        06/22/93       05/05/00
5,228,529        07/809,303        12/17/91        07/20/93       05/08/00
5,298,019        08/004,090        01/13/93        03/29/94       05/05/00
5,299,695        07/919,901        07/27/92        04/05/94       05/10/00
5,301,592        07/715,626        06/14/91        04/12/94       05/05/00
5,305,705        07/837,349        02/14/92        04/26/94       05/08/00
5,308,671        07/886,746        05/21/92        05/03/94       05/08/00
5,310,104        07/807,584        12/16/91        05/10/94       05/08/00
5,312,397        07/763,562        09/23/91        05/17/94       05/08/00
5,317,284        08/015,957        02/08/93        05/31/94       05/09/00
5,317,290        07/110,015        10/19/87        05/31/94       05/10/00
5,318,516        07/989,237        12/11/92        06/07/94       05/08/00
5,324,317        07/953,945        09/30/92        06/28/94       05/08/00
5,335,703        07/963,642        10/20/92        08/09/94       05/08/00
5,353,542        08/023,937        02/25/93        10/11/94       05/08/00
5,376,022        08/161,601        12/06/93        12/27/94       05/05/00
5,380,278        07/904,762        06/26/92        01/10/95       05/08/00
5,388,753        08/215,742        03/21/94        02/14/95       05/11/00
5,389,946        07/997,166        12/28/92        02/14/95       05/05/00
5,418,975        07/971,910        12/18/92        05/23/95       05/08/00
5,427,618        08/105,599        08/12/93        06/27/95       05/08/00
5,430,435        08/172,118        12/22/93        07/04/95       05/09/00
5,431,907        08/285,300        08/03/94        07/11/95       05/05/00
5,437,433        08/127,875        09/28/93        08/01/95       05/08/00
5,452,328        08/100,334        07/30/93        09/19/95       05/08/00
5,454,344        08/340,594        11/16/94        10/03/95       05/11/00
5,460,758        08/402,739        03/13/95        10/24/95       05/08/00
5,466,316        08/337,967        11/14/94        11/14/95       05/11/00
5,467,327        08/343,637        11/22/94        11/14/95       05/11/00
5,468,575        08/169,429        12/17/93        11/21/95       05/10/00
5,469,641        08/380,556        01/30/95        11/28/95       05/11/00
5,473,875        08/165,026        12/09/93        12/12/95       05/08/00
5,477,482        08/130,479        10/01/93        12/19/95       05/08/00
5,482,369        08/302,635        09/08/94        01/09/96       05/11/00
5,484,766        08/195,584        02/14/94        01/16/96       05/08/00
5,485,527        08/411,065        03/27/95        01/16/96       05/09/00
5,487,276        08/239,981        05/05/94        01/30/96       05/08/00
5,488,746        08/323,684        10/18/94        02/06/96       05/08/00
5,490,200        08/386,600        02/10/95        02/06/96       05/10/00
5,490,907        08/134,436        10/12/93        02/13/96       05/10/00
5,494,122        08/317,969        10/04/94        02/27/96       05/08/00
5,494,369        08/348,566        12/02/94        02/27/96       05/11/00
5,498,342        08/428,510        04/25/95        03/12/96       05/11/00
5,498,424        08/348,366        11/30/94        03/12/96       05/10/00


                 Patents Reinstated Due to the Acceptance of a
                      Late Maintenance Fee From 05/12/00

Patent           Serial            Filing          Issue          Granted
Number           Number            Date            Date           Date

Re 34,243        07/728,537        07/11/91        05/04/93       05/17/00
4,674,338        06/688,867        12/31/84        06/23/87       05/16/00
4,684,526        06/685,155        12/21/84        08/04/87       05/15/00
4,703,470        06/765,677        08/15/85        10/27/87       05/17/00
4,903,894        07/246,664        09/02/88        02/27/90       05/17/00
4,943,343        07/393,199        08/14/89        07/24/90       05/12/00
4,943,709        07/350,353        05/11/89        07/24/90       05/17/00
4,943,782        07/170,957        03/21/88        07/24/90       05/17/00
4,945,013        07/295,094        01/09/89        07/31/90       05/12/00
5,078,995        07/522,206        05/11/90        01/07/92       05/17/00
5,118,500        07/356,734        05/25/89        06/02/92       05/18/00
5,317,322        08/083,396        06/28/93        05/31/94       05/12/00
5,377,912        08/192,450        02/07/94        01/03/95       05/17/00
5,403,128        07/944,832        09/14/92        04/04/95       05/17/00
5,419,062        08/072,132        06/03/93        05/30/95       05/17/00
5,419,188        07/703,287        05/20/91        05/30/95       05/18/00
5,419,919        08/141,281        10/22/93        05/30/95       05/15/00
5,425,765        08/083,065        06/25/93        06/20/95       05/16/00
5,426,045        08/263,250        06/21/94        06/20/95       05/12/00
5,442,994        08/022,669        03/01/93        08/22/95       05/15/00
5,445,325        08/092,698        07/16/93        08/29/95       05/15/00
5,469,369        07/970,750        11/02/92        11/21/95       05/15/00
5,479,094        08/427,461        04/24/95        12/26/95       05/12/00
5,485,762        08/263,510        06/20/94        01/23/96       05/18/00
5,486,687        08/312,647        09/27/94        01/23/96       05/18/00