Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5634495 | Wide angle controller with dual function check valves | Don Draper | 1997-06-03 |
| 5620026 | Fluid controller and improved backflow prevention therefor | Dwight B. Stephenson | 1997-04-15 |