Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5673952 | Door stop | Jim A. Chezem, Charles E. Benedict | 1997-10-07 |
| 4789002 | Fluid valve structures | — | 1988-12-06 |
| 4709724 | Fluid valve structures | — | 1987-12-01 |
| 4361169 | Pressure compensated control valves | — | 1982-11-30 |
| 4352375 | Control valves | — | 1982-10-05 |
| 4262915 | Low friction drag seals | — | 1981-04-21 |
| 4237769 | Relief valves and mine props incorporating the same | — | 1980-12-09 |