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CHARLES EDOUARD O KEENAN
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CHARLES EDOUARD O KEENAN
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Publication of FR411673ApublicationCriticalpatent/FR411673A/fr
G04C1/04—Winding mechanical clocks electrically by electric motors with rotating or with reciprocating movement
G04C1/06—Winding mechanical clocks electrically by electric motors with rotating or with reciprocating movement winding-up springs
G04C1/065—Winding mechanical clocks electrically by electric motors with rotating or with reciprocating movement winding-up springs by continuous rotating movement
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FR411673D1910-01-181910-01-18Système d'entrainement ou de freinage par frottement pour horloges et autres appareils
ExpiredFR411673A
(fr)
Nouveau système électromécanique pour la connexion des manoeuvres des appareils d'aiguillage, des signaux et des autres mécanismes utilisés dans les gares