Difference between revisions of "patent for "art of producing step-by-step movements" F.W.Wood, 1922 (Q31863)"

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patent for a stepper motor

(‎Created claim: Publication date (P40): 7 March 1922)
Property / Instance of
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Property / Instance of: Early history of moving lights (Theme) / rank
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Normal rank

Revision as of 12:26, 30 July 2023

patent for a stepper motor
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patent for "art of producing step-by-step movements" F.W.Wood, 1922
patent for a stepper motor

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