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United States Patent 1801014

Inventors:
Kurt, Lange
Max, Busch
Publication Date:
04/14/1931
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Assignee:
Kurt, Lange
Max, Busch
Primary Class:
135/139
Other Classes:
135/904, 403/109.300, 135/118, 135/117, 403/63
International Classes:
E04H15/46; E04H15/34