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US 2,923,080 A
Filed
: 03/08/1957
Issued
: 02/02/1960
Est. Priority Date
: 03/08/1957
Status: Expired due to Term
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Current Assignee
Bernard Spangler
Original Assignee
Bernard Spangler
Inventors
Spangler, Bernard
Application Number
US03/644,848
Time in Patent Office
1,061 Days
Field of Search
US Class Current
40/552
CPC Class Codes
G09F 13/0404
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