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3420051
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Patent Grant
3420051
References
Source
Patent Number
3,420,051
Date Filed
Not available
Date Issued
Tuesday, January 7, 1969
55 years ago
CPC
G04C21/28 - by closing a contact to put into action electro-acoustic means
US Classifications
368 - Horology: time measuring systems or devices
059 - Chain, staple, and horseshoe making
968 - Horology
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