Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6581768 | Desktop storage device | China Young | 2003-06-24 |
| 4340202 | Four way valve | David P. Hargraves, Steven E. Williams | 1982-07-20 |
| 4202373 | Four way valve | David P. Hargraves, Steven E. Williams | 1980-05-13 |