Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4800771 | Drive assembly with overspeed brake | Stewart L. Thomson | 1989-01-31 |
| 4797075 | Overspeed protective gear box for a well pump | Joel Flynn Jones, Howard G. Thompson | 1989-01-10 |