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Kliewer; Glenn A.
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Fairview, OK, US
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Patents Grants
last 30 patents
Information
Patent Grant
Handles for slips used on drilling rigs
Patent number
4,458,934
Issue date
Jul 10, 1984
Kliewer; Larry D.
Harlo W. Janzen
E21 - EARTH DRILLING MINING
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Patent Grant
Power tongs
Patent number
4,445,403
Issue date
May 1, 1984
Kliewer; Larry D.
Harlo W. Janzen
E21 - EARTH DRILLING MINING
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last 30 patents
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