Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4397605 | Mechanized stand handling apparatus for drilling rigs | Charles F. Cowgill | 1983-08-09 |
| 4274778 | Mechanized stand handling apparatus for drilling rigs | Paul S. Putnam, Charles F. Cowgill | 1981-06-23 |