Douglas Allan Roberts

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Cambridge, CA

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Patents Grantslast 30 patents

Information Patent Grant
Discrete passage diffuser
- Patent number 7,628,583
- Issue date Dec 8, 2009
- Pratt & Whitney Canada Corp.
- Douglas Allan Roberts
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Hybrid vane island diffuser
- Patent number 7,025,566
- Issue date Apr 11, 2006
- Pratt & Whitney Canada Corp.
- Ioan Sasu
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
Information Patent Grant
Discrete passage diffuser
- Patent number 6,589,015
- Issue date Jul 8, 2003
- Pratt & Whitney Canada Corp.
- Douglas Allan Roberts
- F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...

Patents Applicationslast 30 patents

Information Patent Application
Discrete passage diffuser
- Publication number 20050118019
- Publication date Jun 2, 2005
- Pratt & Whitney Canada Corp.
- Douglas Allan Roberts
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES
Information Patent Application
Hybrid vane island diffuser
- Publication number 20050095127
- Publication date May 5, 2005
- Ioan Sasu
- F01 - MACHINES OR ENGINES IN GENERAL ENGINE PLANTS IN GENERAL STEAM ENGINES