Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4571642 | Method of and apparatus for modifying a video signal to prevent the unauthorized recording and reproduction thereof | — | 1986-02-18 |
| 4299206 | Foot exerciser | — | 1981-11-10 |
| 4294236 | Foot exerciser | — | 1981-10-13 |
| 4280486 | Foot exerciser | — | 1981-07-28 |
| 4276887 | Foot exerciser | — | 1981-07-07 |
| 4273113 | Foot exerciser | — | 1981-06-16 |
| 4200885 | Ultrasonic scope | — | 1980-04-29 |