David V. Hefford

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Esher, GB

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Patents Grantslast 30 patents

Information Patent Grant
Heating apparatus comprising a plastics body and a planar heating e...
- Patent number 6,377,750
- Issue date Apr 23, 2002
- U.S. Philips Corporation
- Gerald R. F. Scott
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Heating apparatus and heating element assembly method
- Patent number 6,184,509
- Issue date Feb 6, 2001
- U.S. Philips Corporation
- Gerald R. F. Scott
- B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
Information Patent Grant
Water heating vessel
- Patent number 5,794,520
- Issue date Aug 18, 1998
- U.S. Philips Corporation
- David V. Hefford
- A47 - FURNITURE DOMESTIC ARTICLES OR APPLIANCES COFFEE MILLS SPICE MILLS SUCT...