Title:
Damper construction
United States Patent 1634559


Inventors:
Schmidt, Walter A.
Application Number:
US75164824A
Publication Date:
07/05/1927
Filing Date:
11/22/1924
Assignee:
INT PRECIPITATION CO
Primary Class:
Other Classes:
126/285A, 251/320, 251/368
International Classes:
F23L13/06
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