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Hard solid animal feed supplement
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Patent number 4,431,675
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Issue date Feb 14, 1984
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Jack J. Schroeder
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A23 - FOODS OR FOODSTUFFS THEIR TREATMENT, NOT COVERED BY OTHER CLASSES
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Purifying oil shale retort water
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Patent number 4,124,501
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Issue date Nov 7, 1978
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University of Southern California
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Teh F. Yen
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C05 - FERTILISERS MANUFACTURE THEREOF
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Method of converting oil shale into a fuel
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Patent number 3,982,995
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Issue date Sep 28, 1976
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The University of Southern California
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Teh Fu Yen
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...