| 6524063 |
Hydraulic turbine for enhancing the level of dissolved gas in water |
Richard K. Fisher, Jr., Robert G. Grubb, Christian G. Cabou |
2003-02-25 |
| 6454533 |
Hollow blade for hydraulic turbine or pump |
— |
2002-09-24 |
| 6247893 |
Hydraulic turbine for enhancing the level of dissolved gas in water |
Richard K. Fisher, Jr., Robert G. Grubb |
2001-06-19 |
| 6155783 |
Hollow blade for hydraulic turbine or pump |
— |
2000-12-05 |
| 6095749 |
Hydraulic turbine for enhancing the level of dissolved gas in water |
Richard K. Fisher, Jr., Robert G. Grubb, Christian G. Cabou |
2000-08-01 |
| 5924842 |
Hydraulic turbine for enhancing the level of dissolved gas in water |
Richard K. Fisher, Jr., Robert G. Grubb, Christian G. Cabou |
1999-07-20 |
| 5896657 |
Method of making a turbine blade |
Richard K. Fisher, Jr. |
1999-04-27 |
| 5879130 |
Aeration through runner |
Richard K. Fisher, Jr., Robert G. Grubb |
1999-03-09 |