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Retaining means for the dampers of ventilators
US 2,911,900 A
Filed
: 06/06/1957
Issued
: 11/10/1959
Est. Priority Date
: 06/06/1957
Status: Expired due to Term
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Current Assignee
Emil Rudy
Original Assignee
Emil Rudy
Inventors
Rudy, Emil
Application Number
US03/664,083
Time in Patent Office
887 Days
Field of Search
US Class Current
454/352
CPC Class Codes
F04D 25/14
and having shutters, e.g. a...
F24F 13/1413
using more than one tilting...
F24F 13/1426
characterised by actuating ...
F24F 7/025
with forced air circulation...
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