Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D330319 | Locking needle valve handle | Peter C. Williams | 1992-10-20 |
| 5083749 | Plastic needle valve | Peter C. Williams | 1992-01-28 |
| D305927 | Nut lock plate | Peter C. Williams | 1990-02-06 |
| 4735533 | Valve locking assembly | Michael T. Gallagher, Peter C. Williams | 1988-04-05 |
| 4714237 | Soft seat for metering valve | Peter C. Williams | 1987-12-22 |
| 4635677 | Valve manifold mounting bracket | Peter C. Williams | 1987-01-13 |