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2708337
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Information
Patent Grant
2708337
References
Source
Patent Number
2,708,337
Date Filed
Not available
Date Issued
Tuesday, May 17, 1955
69 years ago
CPC
G04C21/12 - by electro-acoustic means
US Classifications
368 - Horology: time measuring systems or devices
084 - Music
340 - Communications: electrical
968 - Horology
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