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1677872
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Information
Patent Grant
1677872
References
Source
Patent Number
1,677,872
Date Filed
Not available
Date Issued
Tuesday, July 17, 1928
96 years ago
CPC
G04B19/2438 - driven or released by their own energy source which is released at regular time intervals
US Classifications
368 - Horology: time measuring systems or devices
040 - Card, picture, or sign exhibiting
968 - Horology
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