John Christopher Clarke

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Cambridge, GB

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Patents Grantslast 30 patents

Information Patent Grant
Radio positioning systems
- Patent number 7,508,883
- Issue date Mar 24, 2009
- Cambridge Positioning Systems Limited
- Peter James Duffett-Smith
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Radio location system measurement unit
- Patent number 7,260,407
- Issue date Aug 21, 2007
- Cambridge Positioning Systems Ltd.
- Peter James Duffett-Smith
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Radio positioning systems
- Patent number 6,894,644
- Issue date May 17, 2005
- Cambridge Positioning Systems Limited
- Peter James Duffett-Smith
- G01 - MEASURING TESTING

Patents Applicationslast 30 patents

Information Patent Application
Radio positioning systems
- Publication number 20050200525
- Publication date Sep 15, 2005
- Peter James Duffett-Smith
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Radio positioning systems
- Publication number 20040196186
- Publication date Oct 7, 2004
- Peter James Duffett-Smith
- G01 - MEASURING TESTING
Information Patent Application
Radio location system measurement unit
- Publication number 20040097241
- Publication date May 20, 2004
- Peter James Duffet-Smith
- H04 - ELECTRIC COMMUNICATION TECHNIQUE