Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4635678 | Flow control apparatus | Charles P. Peterman | 1987-01-13 |
| 4605195 | Annular blowout preventer packing unit | James A. Burton, Kenneth W. Colvin | 1986-08-12 |
| 4444250 | Flow diverter | Charles D. Morrill, Joseph R. Roche | 1984-04-24 |
| 4342330 | Ball type valve having improved redundant sealing system | Raymond E. Wieveg | 1982-08-03 |