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TEACHING MACHINE
US 3,497,966 A
Filed
: 02/20/1967
Issued
: 03/03/1970
Est. Priority Date
: 02/20/1967
Status: Expired due to Term
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Current Assignee
The Palisades Educational Foundation, Inc.
Original Assignee
Thomas J. Gaven
Inventors
Gaven, Thomas J.
Application Number
US04/618,295
Time in Patent Office
1,107 Days
Field of Search
US Class Current
434/315
CPC Class Codes
G09B 7/08
characterised by modifying ...
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