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2248081
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Information
Patent Grant
2248081
References
Source
Patent Number
2,248,081
Date Filed
Not available
Date Issued
Tuesday, July 8, 1941
82 years ago
CPC
H04M3/4876 - Time announcements
US Classifications
369 - Dynamic information storage or retrieval
250 - Radiant energy
379 - Telephonic communications
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