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US 2,574,870 A
Filed
: 02/25/1950
Issued
: 11/13/1951
Est. Priority Date
: 02/25/1950
Status: Expired due to Term
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Current Assignee
Donald A. Gunn
Original Assignee
Donald A. Gunn
Inventors
Gunn, Donald A.
Application Number
US03/146,235
Time in Patent Office
626 Days
Field of Search
US Class Current
211/51
CPC Class Codes
B42F 17/02
in which the cards are stor...
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