Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6220280 | Pilot operated relief valve with system isolating pilot valve from process media | — | 2001-04-24 |
| 6209577 | Modulating action non-flowing pilot operated relief valve | Erwin R.S. CORTEZ | 2001-04-03 |
| 5950657 | Modulating action non-flowing pilot operated relief valve | Erwin R.S. CORTEZ | 1999-09-14 |
| 5305780 | Pressure relief valve with auxiliary loading device | — | 1994-04-26 |
| 5234023 | Pressure relief valve with auxiliary loading device | — | 1993-08-10 |