PATENTS REINSTATED DUE TO THE ACCEPTANCE OF A LATE
                         MAINTENANCE FEE FROM 6/23/95

Patent No.       Serial No.     Filing Date      Issue Date     Granted Date

Re. 34,486       07/772,389        10/07/91        12/21/93       06/30/95
4,363,580        06/281,778        07/09/81        12/14/82       06/26/95
4,528,442        06/614,387        05/25/84        07/09/85       06/30/95
4,535,597        06/573,679        01/25/84        08/20/85       06/23/95
4,605,701        06/662,726        10/19/84        08/12/86       06/23/95
4,610,972        06/601,685        04/18/84        09/09/86       06/27/95
4,660,336        06/807,376        12/10/85        04/28/87       06/30/95
4,853,780        07/154,881        02/11/88        08/01/89       06/23/95
4,898,504        07/277,778        11/30/88        02/06/90       06/30/95
4,906,093        07/222,403        07/21/88        03/06/90       06/27/95
4,953,553        07/350,500        05/11/89        09/04/90       06/26/95
4,968,265        07/374,622        06/29/89        11/06/90       06/27/95
4,969,251        07/338,890        04/17/89        11/13/90       06/27/95
4,974,288        07/469,081        01/23/90        12/04/90       06/29/95
4,978,658        07/257,723        10/14/88        12/18/90       06/27/95
4,989,256        07/215,583        07/06/88        01/29/91       06/29/95
4,997,827        07/321,083        03/09/89        03/05/91       06/30/95
5,002,672        07/532,261        06/01/90        03/26/91       06/29/95
5,007,828        07/476,734        02/08/90        04/16/91       06/27/95