David Edwards Jr.

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Bellport, NY, US

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Patents Grantslast 30 patents

Information Patent Grant
Electronic-type vacuum gauges with replaceable elements
- Patent number 4,471,661
- Issue date Sep 18, 1984
- David Edwards
- G01 - MEASURING TESTING
Information Patent Grant
Vacuum leak detector and method
- Patent number 4,409,817
- Issue date Oct 18, 1983
- David Edwards
- G01 - MEASURING TESTING
Information Patent Grant
Method of determining the x-ray limit of an ion gauge
- Patent number 4,302,679
- Issue date Nov 24, 1981
- The United States of America as represented by the United States Department o...
- David Edwards
- G01 - MEASURING TESTING
Information Patent Grant
Gaseous trace impurity analyzer and method
- Patent number 4,214,473
- Issue date Jul 29, 1980
- The United States of America as represented by the United States Department o...
- David Edwards
- G01 - MEASURING TESTING