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Cover for a warm air furnace register
United States Patent 2229388
Inventors:
Postlewait, Harriet L.
Publication Date:
01/21/1941
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Download PDF 2229388
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Assignee:
Postlewait, Harriet L.
Primary Class:
454/358
Other Classes:
138/89, 220/315, 454/284
International Classes:
F24F13/08