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Automatic telephone system
US 2,402,232 A
Filed
: 03/06/1943
Issued
: 06/18/1946
Est. Priority Date
: 04/20/1942
Status: Expired due to Term
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Current Assignee
Thomas Baker George
Original Assignee
Thomas Baker George
Inventors
THOMAS BAKER GEORGE
Application Number
US02/478,245
Time in Patent Office
1,200 Days
Field of Search
US Class Current
379/303
CPC Class Codes
H04Q 1/50
Conversion between differen...
H04Q 3/00
Selecting arrangements H04Q...
H04Q 3/0016
Arrangements providing conn...
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