Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5064326 | Tamper proof service bolt | Robert E. Davis | 1991-11-12 |
| 5042528 | Gas service tee | Robert E. Davis | 1991-08-27 |
| 5039062 | Tamper proof valve | Robert E. Davis | 1991-08-13 |
| 4823651 | Expansion plug and tool | — | 1989-04-25 |