Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6402477 | Adjustable blade turbines | Joseph M. Cybularz, Richard K. Donelson, Richard K. Fisher, Jr., Robert G. Grubb, Siegbert Etter +1 more | 2002-06-11 |
| 6164907 | Adjustable blade turbines | Joseph M. Cybularz, Richard K. Donelson, Richard K. Fisher, Jr., Robert G. Grubb, Siegbert Etter +1 more | 2000-12-26 |
| 6016600 | Method of assembling a turbine runner situated in a water passageway | Mark E. Kennell, Robert G. Grubb, Robert D. Steele | 2000-01-25 |
| 5947679 | Adjustable blade turbines | Joseph M. Cybularz, Richard K. Donelson, Richard K. Fisher, Jr., Robert G. Grubb, Siegbert Etter +1 more | 1999-09-07 |