Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date | Approx Value ⓘ |
|---|---|---|---|---|
| 5083821 | Extreme temperature thread sealing method and apparatus | — | 1992-01-28 | $14,191,000 |
| 5081328 | Flow switch | Darrell J. Christy | 1992-01-14 | $30,709,000 |
| 4887631 | Fire isolation device | Lawrence A. Dunham | 1989-12-19 | $7,484,000 |