Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5135360 | Method and device for controlling tank vapors on a petroleum storage tank | R. David Anderson | 1992-08-04 |
| 4699175 | Flapper actuated pilot valve | R. David Anderson | 1987-10-13 |
| 4512365 | Pilot valve for an oil and gas separator | R. David Anderson | 1985-04-23 |