Rotech Holdings Limited
Patent Applications and Registrations
Patent applications and USPTO patent grants for Rotech Holdings Limited.The latest application filed is for "underwater excavation apparatus".
- Rotech Holdings Limited - Aberdeen GB
- Rotech Holdings Limited -
- Rotech Holdings, Ltd. - Aberdeen GB
| Patent | Date |
|---|---|
| Underwater excavation apparatus Grant 8,522,460 - Stewart September 3, 2 | 2013-09-03 |
| Water turbine with bi-symmetric airfoil Grant 8,115,329 - Thompson February 14, 2 | 2012-02-14 |
| Power generator and turbine unit Grant 7,944,073 - Van Drentham Susman , et al. May 17, 2 | 2011-05-17 |
| Underwater Excavation Apparatus App 20110056098 - Stewart; Donald | 2011-03-10 |
| Power generator and turbine unit Grant 7,768,145 - Susman , et al. August 3, 2 | 2010-08-03 |
| Downhole pump assembly and method of recovering well fluids Grant 7,686,075 - Stewart , et al. March 30, 2 | 2010-03-30 |
| Underwater Excavation Apparatus App 20100043256 - Susman; Hector Filippus Alexander Van Drentham ; et al. | 2010-02-25 |
| Power Generator And Turbine Unit App 20090179425 - Van Drentham Susman; Hector Fillipus Alexander ; et al. | 2009-07-16 |
| Thrust bearing for down-hole tool Grant 7,104,698 - Van Drentham-Susman September 12, 2 | 2006-09-12 |
| Downhole tool Grant 7,073,610 - Susman July 11, 2 | 2006-07-11 |
| Speed governor Grant 6,854,953 - Van Drentham-Susman , et al. February 15, 2 | 2005-02-15 |
| Window cutting tool for well casing Grant 6,581,690 - Van Drentham-Susman , et al. June 24, 2 | 2003-06-24 |
| Turbine for down-hole drilling Grant 6,527,513 - Van Drentham-Susman , et al. March 4, 2 | 2003-03-04 |
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