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Wind motors
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Patent number 4,017,204
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Issue date Apr 12, 1977
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Donald L. Sellman
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F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
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Wind motors
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Patent number 3,988,072
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Issue date Oct 26, 1976
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Donald L. Sellman
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F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
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Wind motors
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Patent number 3,986,786
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Issue date Oct 19, 1976
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Donald L. Sellman
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F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...