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3141068
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Information
Patent Grant
3141068
References
Source
Patent Number
3,141,068
Date Filed
Not available
Date Issued
Tuesday, July 14, 1964
59 years ago
CPC
H04M3/64 - Arrangements for signalling the number or class of the calling line to the operator
H04M1/02 - Constructional features of telephone sets
H04M1/6033 - for providing handsfree use or a loudspeaker mode in telephone sets
H04M1/62 - Constructional arrangements
H04M19/04 - ringing-current generated at substation
US Classifications
379 - Telephonic communications
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