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United States Patent 3389550
US Patent References:
Chronometer mechanism
- - 3319415


Inventors:
Ervin, Piquerez
Publication Date:
06/25/1968
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Primary Class:
368/308
Other Classes:
968/339, 968/211
International Classes:
G04B19/28; G04B37/10; G04B19/00; G04B37/00