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Dual string tubing hanger
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Patent number 4,098,334
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Issue date Jul 4, 1978
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Baker International Corp.
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Talmadge L. Crowe
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E21 - EARTH DRILLING MINING
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Well control valve apparatus
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Patent number 4,059,157
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Issue date Nov 22, 1977
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Baker International Corporation
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Talmadge L. Crowe
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E21 - EARTH DRILLING MINING
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Retrievable well packers
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Patent number 4,044,826
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Issue date Aug 30, 1977
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Baker International Corporation
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Talmadge L. Crowe
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E21 - EARTH DRILLING MINING
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Well control valve apparatus
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Patent number 4,039,031
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Issue date Aug 2, 1977
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Baker Oil Tools, Inc.
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Talmadge L. Crowe
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E21 - EARTH DRILLING MINING
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