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Glass block ventilating device
US 2,738,838 A
Filed
: 06/04/1952
Issued
: 03/20/1956
Est. Priority Date
: 06/04/1952
Status: Expired due to Term
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Current Assignee
John H. Sutter
Original Assignee
John H. Sutter
Inventors
Sutter, John H.
Application Number
US03/291,648
Time in Patent Office
1,385 Days
Field of Search
US Class Current
160/95
CPC Class Codes
E04C 1/42
of glass or other transpare...
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