Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5121947 | Expansion sealing device | Leighton Lee, II, Loren Bonsack, Fredrick J. Pecor, John L. Grillo | 1992-06-16 |
| 4867333 | High-pressure pin plug | Robert J. Kolp, Stephen E. Anderson | 1989-09-19 |