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Historical Woodward Governor Company Prime Mover Control Patents.
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Elmer Woodward's LATHE-CENTER GRINDER PATENT.
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Patent number 438,876. Patented October 21, 1890.
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Sunday 23 July 2023
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Historical Woodward Governor Company Prime Mover Control Patents.
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Elmer Woodward's LATHE-CENTER GRINDER PATENT.
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