Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5653418 | Ram-type blowout preventer | — | 1997-08-05 |
| 5593157 | Long life, low air permeable pressurized articles such as play balls | William J. Koros, I. Glen Hargis, Jason S. Harris | 1997-01-14 |