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G04C1/02—Winding mechanical clocks electrically by electromagnets
G04C1/022—Winding mechanical clocks electrically by electromagnets with snap-acting armature
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FR711191D1930-05-191930-05-19Perfectionnements aux dispositifs électro-mécaniques pour la commande de mouvements d'horlogerie et autres applications
ExpiredFR711191A
(fr)