Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6651910 | High pressure water control device | — | 2003-11-25 |
| 6447259 | Pressure energy recovery device | — | 2002-09-10 |
| 5950673 | Valves | — | 1999-09-14 |
| 5735552 | Swivel coupler | — | 1998-04-07 |
| 5135264 | Flow coupling with frangible pressure sensitive holding member to allow venting | — | 1992-08-04 |
| 5073067 | Mine roof support | — | 1991-12-17 |
| 4552488 | Mine roof support system | — | 1985-11-12 |