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Edmund M. Hamlin
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East Hampton, CT, US
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last 30 patents
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Patent Grant
Method and apparatus for measurement of azimuth of a borehole while...
Patent number
4,894,923
Issue date
Jan 23, 1990
Alcan International Limited
Martin E. Cobern
E21 - EARTH DRILLING MINING
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Patent Grant
Method for the detection and correction of magnetic interference in...
Patent number
4,761,889
Issue date
Aug 9, 1988
Teleco Oilfield Services Inc.
Martin E. Cobern
E21 - EARTH DRILLING MINING