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3889461
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Information
Patent Grant
3889461
References
Source
Patent Number
3,889,461
Date Filed
Not available
Date Issued
Tuesday, June 17, 1975
49 years ago
CPC
G04G9/0005 - Transmission of control signals
G04C13/02 - Circuit arrangements Electric clock installations
G04G19/10 - Arrangements for supplying back-up power
US Classifications
368 - Horology: time measuring systems or devices
968 - Horology
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