Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9407115 | Shaft attachment means for high efficiency permanent magnet machine with separated tab pole rotor | Russel Hugh Marvin | 2016-08-02 |
| 8878411 | High efficiency permanent magnet machine with separated tab pole rotor and stacked ceramic magnet sections | Russel Hugh Marvin | 2014-11-04 |
| 8506463 | Roller assembly | Gary P. Deaville | 2013-08-13 |
| 8136673 | Grit elevator | — | 2012-03-20 |
| 5544819 | Rotary disintegrators | — | 1996-08-13 |
| 4422580 | Macerator pumping impeller | Graham M. Preece | 1983-12-27 |