Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4868516 | Alternating current amplifier with digitally controlled frequency response | Leslie Szepesi | 1989-09-19 |
| 4825519 | Machine for making awnings | William ASPINALL | 1989-05-02 |
| 4815761 | Amphibious scuba assist devices | Brian Bahls | 1989-03-28 |