Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6209577 | Modulating action non-flowing pilot operated relief valve | Ying-San Lai | 2001-04-03 |
| 5950657 | Modulating action non-flowing pilot operated relief valve | Ying-San Lai | 1999-09-14 |
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6209577 | Modulating action non-flowing pilot operated relief valve | Ying-San Lai | 2001-04-03 |
| 5950657 | Modulating action non-flowing pilot operated relief valve | Ying-San Lai | 1999-09-14 |