| 6533536 |
Hydro-turbine runner |
Richard K. Fisher, Jr., Robert G. Grubb, Richard K. Donelson, Mark E. Kennell, Wolfgang Heine |
2003-03-18 |
| 6402477 |
Adjustable blade turbines |
Richard K. Donelson, Richard K. Fisher, Jr., Robert G. Grubb, Randy V. Seifarth, Siegbert Etter +1 more |
2002-06-11 |
| 6254339 |
Hydro-turbine runner |
Richard K. Fisher, Jr., Robert G. Grubb, Richard K. Donelson, Mark E. Kennell, Wolfgang Heine |
2001-07-03 |
| 6164907 |
Adjustable blade turbines |
Richard K. Donelson, Richard K. Fisher, Jr., Robert G. Grubb, Randy V. Seifarth, Siegbert Etter +1 more |
2000-12-26 |
| 5954474 |
Hydro-turbine runner |
Richard K. Fisher, Jr., Robert G. Grubb, Richard K. Donelson, Mark E. Kennell, Wolfgang Heine |
1999-09-21 |
| 5947679 |
Adjustable blade turbines |
Richard K. Donelson, Richard K. Fisher, Jr., Robert G. Grubb, Randy V. Seifarth, Siegbert Etter +1 more |
1999-09-07 |
| 5941682 |
Draft tube peripheral plenum |
Robert D. Steele, Irvin E. Scott, Jr., Richard K. Fisher, Jr. |
1999-08-24 |
| 5924844 |
Dissolved gas augmentation with mixing chambers |
Richard K. Fisher, Jr., Gary F. Franke, Robert G. Grubb |
1999-07-20 |
| 5823740 |
Dissolved gas augmentation with mixing chambers |
Richard K. Fisher, Jr., Gary F. Franke, Robert G. Grubb |
1998-10-20 |