Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5257792 | Well head metal seal | Samuel W. Putch, John W. Pierce | 1993-11-02 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5257792 | Well head metal seal | Samuel W. Putch, John W. Pierce | 1993-11-02 |