Title:
Roof ventilator
Document Type and Number:
United States Patent 2909113
Inventors:
Hatcher, Robert L.
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Publication Date:
10/20/1959
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Referenced by:
Export Citation:
Assignee:
NOLL MFG COMPANY
Primary Class:
Other Classes:
29/513, 285/44, 454/3, 138/120
International Classes:
E04D13/147; F24F7/02; E04D13/14
US Patent References: