Issued Patents All Time
Showing 51–69 of 69 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5683479 | Air cleaner having scavenger arrangement | Peter A. Betts, Daniel T. Risch, James C. Rothman, Fred H. Wahlquist | 1997-11-04 |
| 5575826 | Air cleaner | Peter A. Betts, Daniel T. Risch, James C. Rothman, Fred H. Wahlquist | 1996-11-19 |
| 5435347 | Exhaust systems for motorized vehicles | — | 1995-07-25 |
| 5401285 | Air cleaner having scavenger arrangement for precleaner and filter thereof | Peter A. Betts, Daniel T. Risch, James C. Rothman, Fred H. Wahlquist | 1995-03-28 |
| 5357755 | Trap apparatus with bypass | Marty Barris, Charles O. Reinhart, Julian A. Imes, Erland D. Anderson, Peter A. Betts | 1994-10-25 |
| 5293742 | Trap apparatus with tubular filter element | James C. Rothman, Kelly C. Robertson, Marty Barris, Peter A. Betts, Wayne M. Wagner | 1994-03-15 |
| 5246205 | Valve assembly and use | James C. Rothman, Peter A. Betts, Wayne M. Wagner | 1993-09-21 |
| 5212948 | Trap apparatus with bypass | Marty Barris, Charles O. Reinhart, Julian A. Imes, Erland D. Anderson | 1993-05-25 |
| 5116083 | Clamp for coupling and sealing pipe joints | Wayne M. Wagner, Fred H. Wahlquist | 1992-05-26 |
| 4969994 | Seal arrangement for fluid filters and method | Kenneth G. Misgen, Gary J. Rocklitz, Reynold F. Durre | 1990-11-13 |
| 4834885 | Seal arrangement for fluid filters | Kenneth G. Misgen, Gary J. Rocklitz, Reynold F. Durre | 1989-05-30 |
| 4819549 | End seal for clean room ceiling supports | Joseph C. Tokar | 1989-04-11 |
| 4622995 | Integral valve and tank assembly for pulse-jet air cleaners | — | 1986-11-18 |
| 4622996 | Aspirator for pulse-jet air cleaner | — | 1986-11-18 |
| 4588423 | Electrostatic separator | James C. Rothman | 1986-05-13 |
| 4504293 | Self-cleaning air filter | Fred H. Wahlquist, Bernard A. Matthys | 1985-03-12 |
| 4500332 | Throughput blade for louvered separators | — | 1985-02-19 |
| 4452616 | Self-cleaning air cleaner | Fred H. Wahlquist | 1984-06-05 |
| 4351567 | Cowl-like scrubber for a long-wall shearer | — | 1982-09-28 |