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Plug for tubulars
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Patent number 6,474,414
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Issue date Nov 5, 2002
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Texaco, Inc.
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Manuel Eduardo Gonzalez
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E21 - EARTH DRILLING MINING
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Method of tagging hydrocarbon fuels
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Patent number 5,981,283
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Issue date Nov 9, 1999
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Isotag, L.L.C.
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David K. Anderson
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
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Linear plane perforator
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Patent number 4,676,309
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Issue date Jun 30, 1987
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Exxon Production Research Company
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Manuel E. Gonzalez
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E21 - EARTH DRILLING MINING
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