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: Backup document (P74): US1408555.pdf)
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Revision as of 11:41, 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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