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2640175
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Patent Grant
2640175
References
Source
Patent Number
2,640,175
Date Filed
Not available
Date Issued
Tuesday, May 26, 1953
71 years ago
CPC
G04C3/042 - using mechanical coupling
US Classifications
318 - Electricity: motive power systems
368 - Horology: time measuring systems or devices
968 - Horology
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