Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4478279 | Retrievable inside blowout preventer valve apparatus | B. J. Parham | 1984-10-23 |
| 4294314 | Inside blowout preventer well tool | Tosh Miyagishima, Raymond E. Wieveg | 1981-10-13 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4478279 | Retrievable inside blowout preventer valve apparatus | B. J. Parham | 1984-10-23 |
| 4294314 | Inside blowout preventer well tool | Tosh Miyagishima, Raymond E. Wieveg | 1981-10-13 |