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Kevin J. Humphreys
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Edmonton, CA
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last 30 patents
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Patent Grant
Pipe coupling
Patent number
5,468,029
Issue date
Nov 21, 1995
IPSCO Enterprises Inc.
Thomas L. Blose
E21 - EARTH DRILLING MINING
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Patent Grant
Pipe coupling
Patent number
5,330,239
Issue date
Jul 19, 1994
IPSCO Enterprises Inc.
Thomas L. Blose
E21 - EARTH DRILLING MINING