Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5555910 | Pressure relief valves adapted for low pressure operation | Walter W. Powell, Milton Anderson, Aciel Martin | 1996-09-17 |
| 5499648 | Sealing means for pressure relief valves and methods of assembly | Walter W. Powell | 1996-03-19 |
| 5421360 | Float assisted automatic driptrap | Milton Anderson | 1995-06-06 |
| 5238021 | Diaphragm operated spring loaded regulator | Walter W. Powell | 1993-08-24 |