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John R. Cash
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Pasadena, CA, US
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last 30 patents
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Patent Grant
Survey apparatus and method employing rate-of-turn and free gyroscopes
Patent number
4,297,790
Issue date
Nov 3, 1981
Applied Technologies Associates
Donald H. Van Steenwyk
E21 - EARTH DRILLING MINING
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Patent Grant
Survey apparatus and method employing all latitude, all attitude gy...
Patent number
4,197,654
Issue date
Apr 15, 1980
Applied Technologies Associates
Donald H. Van Steenwyk
E21 - EARTH DRILLING MINING
Information
Patent Grant
Survey apparatus and method employing rate-of-turn and free gyroscopes
Patent number
4,192,077
Issue date
Mar 11, 1980
Applied Technologies Associates
Donald H. Van Steenwyk
E21 - EARTH DRILLING MINING