Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6772786 | Self-contained hydraulic ESD system | — | 2004-08-10 |
| 6409843 | Method of injecting pigs into a pipe | — | 2002-06-25 |
| 6276135 | Self-contained hydraulic ESD system | — | 2001-08-21 |
| 6079074 | Pipe pig injector | — | 2000-06-27 |
| 5752690 | Threaded coupling and pig injector valve | — | 1998-05-19 |
| 5744771 | Pressure switch with increased deadband | — | 1998-04-28 |
| 5670766 | Pressure switch | — | 1997-09-23 |
| 5554834 | Pressure switch | — | 1996-09-10 |
| 5213133 | Pressure responsive pilot control valve | — | 1993-05-25 |
| 4961560 | Two way latching trip valve | — | 1990-10-09 |
| 4423748 | Emergency shut down device | — | 1984-01-03 |
| 4391152 | Sampler | — | 1983-07-05 |