Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10436335 | Valves with multi-directional ball check | Richard C. Hughes, Melvin O. Castillo | 2019-10-08 |
| 8584705 | Bidirectional sleeved/plug ball check valve | Richard C. Hughes, Melvin O. Castillo | 2013-11-19 |