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3701997
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Information
Patent Grant
3701997
References
Source
Patent Number
3,701,997
Date Filed
Not available
Date Issued
Tuesday, October 31, 1972
51 years ago
CPC
H04N1/032 - for picture information reproduction
H04N1/16 - using a rotating helical element
US Classifications
347 - Incremental printing of symbolic information
204 - Chemistry: electrical and wave energy
346 - Recorders
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