Issued Patents All Time
Showing 1–10 of 10 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6023880 | Method and apparatus for enhancing growth characteristics of seeds using ion-electron avalanches | William C. Levengood | 2000-02-15 |
| 5740627 | Method and apparatus for enhancing growth characteristics of seeds using ion-electron avalanches | William C. Levengood | 1998-04-21 |
| 5575484 | Fluid pressure activated piston return spring seal | — | 1996-11-19 |
| 5482297 | Seal element for installation in an annular dove-tail groove | James W. Burns | 1996-01-09 |
| 5254258 | Chiral selector useful for separation of enantiomers of .beta.-amino alcohol compounds | William H. Pirkle | 1993-10-19 |
| 4421323 | Oil well string member with static seal | — | 1983-12-20 |
| 4421330 | Antifriction fluid seal assembly | — | 1983-12-20 |
| 4352498 | Spring seal | James B. Gross | 1982-10-05 |
| 4342463 | Spring seal | — | 1982-08-03 |
| 4229013 | Spring seal | James B. Gross | 1980-10-21 |