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US 3,012,378 A
Filed
: 12/28/1956
Issued
: 12/12/1961
Est. Priority Date
: 12/28/1956
Status: Expired due to Term
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Current Assignee
Robert A. Boyd
Original Assignee
Robert A. Boyd
Inventors
Boyd, Robert A.
Application Number
US03/631,311
Time in Patent Office
1,810 Days
Field of Search
US Class Current
52/308
CPC Class Codes
E04B 5/46
Special adaptation of floor...
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