David J. Fisher

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North Adams, MA, US

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Patents Grantslast 30 patents

Information Patent Grant
Chemical test kit for use in detecting impurities in oil samples
- Patent number 5,200,149
- Issue date Apr 6, 1993
- Electric Power Research Institute, Inc.
- David J. Fisher
- G01 - MEASURING TESTING
Information Patent Grant
Method for measuring the content of halogenated organic compounds i...
- Patent number 5,028,543
- Issue date Jul 2, 1991
- Dexsil Corporation
- Stephen R. Finch
- B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
Information Patent Grant
Method for detecting impurities in an oil sample
- Patent number 4,957,871
- Issue date Sep 18, 1990
- Electric Power Research Institute, Inc.
- David J. Fisher
- G01 - MEASURING TESTING
Information Patent Grant
Chemical test kit for detecting impurities in an oil sample
- Patent number 4,873,056
- Issue date Oct 10, 1989
- Electric Power Research Institute, Inc.
- David J. Fisher
- G01 - MEASURING TESTING
Information Patent Grant
Method for detecting impurities in an oil sample
- Patent number 4,686,192
- Issue date Aug 11, 1987
- Electric Power Research Institute, Inc.
- David J. Fisher
- G01 - MEASURING TESTING
Information Patent Grant
Method and apparatus for analyzing gases dissolved in a liquid sample
- Patent number 4,587,834
- Issue date May 13, 1986
- General Electric Company
- David J. Fisher
- G01 - MEASURING TESTING