Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5556077 | Air lifting and balancing unit | Peter L. Hong, Thomas A. Mefferd, Michael D. Olson | 1996-09-17 |
| 5520368 | Air lifting and balancing unit with constant force pneumatic circuit | Thomas A. Mefferd, Michael D. Olson | 1996-05-28 |
| 5517821 | Pneumatic control circuit for applying constant force | Peter L. Hong, Thomas A. Mefferd, Michael D. Olson | 1996-05-21 |
| 5439200 | Air lifting and balancing unit | Peter L. Hong, Thomas A. Mefferd, Michael D. Olson | 1995-08-08 |