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Wind turbines
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Patent number 4,648,801
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Issue date Mar 10, 1987
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James Howden & Company Limited
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Robert R. Wilson
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F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
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Pulverizing apparatus
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Patent number 4,553,704
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Issue date Nov 19, 1985
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James Howden & Company Limited
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Robert R. Wilson
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B02 - CRUSHING, PULVERISING, OR DISINTEGRATING PREPARATORY TREATMENT OF GRAIN...
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Fans or the like
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Patent number 4,255,080
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Issue date Mar 10, 1981
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James Howden & Company Limited
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Robert R. Wilson
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...