Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6431146 | Free piston engine and self-actuated fuel injector therefor | — | 2002-08-13 |
| 6349682 | Free piston engine and self-actuated fuel injector therefor | — | 2002-02-26 |
| 5074521 | High force-gain valve | William R. Spencer | 1991-12-24 |
| 4995587 | Motion amplifier employing a dual piston arrangement | — | 1991-02-26 |
| 4477056 | High force-gain valve | — | 1984-10-16 |