John T. Redfern

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La Jolla, CA, US

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Patents Grantslast 30 patents

Information Patent Grant
Method of making an undersea, high pressure bulkhead penetrator for...
- Patent number 4,469,399
- Issue date Sep 4, 1984
- The United States of America as represented by the Secretary of the Navy
- Steven J. Cowen
- G02 - OPTICS
Information Patent Grant
Apparatus for multiplexing digital signals
- Patent number 4,330,855
- Issue date May 18, 1982
- The United States of America as represented by the Secretary of the Navy
- John T. Redfern
- G08 - SIGNALLING
Information Patent Grant
Piezoelectric vibration detector for sensing a nearby intruder
- Patent number 4,194,194
- Issue date Mar 18, 1980
- The United States of America as represented by the Secretary of the Navy
- John T. Redfern
- G08 - SIGNALLING
Information Patent Grant
Combined intrusion sensor line
- Patent number 4,144,530
- Issue date Mar 13, 1979
- The United States of America as represented by the Secretary of the Navy
- John T. Redfern
- G08 - SIGNALLING