Title:
Ventilating window sash
United States Patent 1798540


Inventors:
Kelly, Edward S.
Application Number:
US38442129A
Publication Date:
03/31/1931
Filing Date:
08/08/1929
Assignee:
Kelly, Edward S.
Primary Class:
Other Classes:
49/71, 49/80.1, 49/90.1
International Classes:
E06B7/084
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