Title:
Automatic screen
Document Type and Number:
United States Patent 1338223
Inventors:
Samuel, Heath
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Publication Date:
04/27/1920
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Assignee:
Samuel, Heath
Primary Class:
Other Classes:
160/315, 160/DIG.011, 160/290.100, 160/314, 160/122
International Classes:
E06B9/54; E06B9/52