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Remote question-answer apparatus
US 2,921,385 A
Filed
: 04/25/1955
Issued
: 01/19/1960
Est. Priority Date
: 04/25/1955
Status: Expired due to Term
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Current Assignee
Sanborn Hamilton
Original Assignee
Sanborn Hamilton
Inventors
SANBORN HAMILTON
Application Number
US03/503,434
Time in Patent Office
1,730 Days
Field of Search
US Class Current
434/321
CPC Class Codes
A63F 13/12
involving interaction betwe...
A63F 13/30
Interconnection arrangement...
A63F 13/80
Special adaptations for exe...
A63F 9/183
electric
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