David H. Walker

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Winchester, MA, US

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Patents Grantslast 30 patents

Information Patent Grant
Passive filtration system
- Patent number 6,641,648
- Issue date Nov 4, 2003
- Foster-Miller, Inc.
- David H. Walker
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Gel-based vapor extractor and methods
- Patent number 5,565,139
- Issue date Oct 15, 1996
- Gel Sciences, Inc.
- David H. Walker
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Gel-based vapor extractor and methods
- Patent number 5,534,186
- Issue date Jul 9, 1996
- Gel Sciences, Inc.
- David H. Walker
- F24 - HEATING RANGES VENTILATING
Information Patent Grant
Demand defrost controller for refrigerated display cases
- Patent number 4,993,233
- Issue date Feb 19, 1991
- Power Kinetics, Inc.
- David N. Borton
- A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...

Patents Applicationslast 30 patents

Information Patent Application
Fog carburetor
- Publication number 20100170481
- Publication date Jul 8, 2010
- David H. Walker
- Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMA...
Information Patent Application
Passive filtration system
- Publication number 20020166811
- Publication date Nov 14, 2002
- David H. Walker
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL