Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5022832 | Ring valve type air compressor | Nathan Ritchie, Richard F. Miller | 1991-06-11 |
| 4993922 | Air compressor unloader system | Nathan Ritchie, Richard F. Miller | 1991-02-19 |
| 4781530 | Compressor range improvement means | James D. Kahlenbeck, Bruce W. Turner | 1988-11-01 |
| 4460284 | Turbocharger assembly including a flexible anti-friction bearing support | Hans J. Schlamadinger | 1984-07-17 |
| 4370106 | Bearing assembly for high speed shaft | — | 1983-01-25 |
| 4282960 | Viscous fluid clutch | Richard E. Glasson | 1981-08-11 |
| 4277116 | Bearing construction and retainer therefor | — | 1981-07-07 |