Title:
Swinging sash operator
Document Type and Number:
United States Patent 2817511
Inventors:
Chester, Reynaud Samuel
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Publication Date:
12/24/1957
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Export Citation:
Assignee:
VALLEY METAL PRODUCTS CO
Primary Class:
Other Classes:
74/606R, 49/82.100, 49/341
International Classes:
E05F11/10; E05F11/16; E05F11/00
US Patent References:
Foreign References:
| GB578241A |