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United States Patent 1894401

Inventors:
Hollos, August A.
Publication Date:
01/17/1933
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Assignee:
Hollos, August A.
Primary Class:
52/156
Other Classes:
52/157, 52/161
International Classes:
E02D5/80; F16B13/08; F16B21/10; F16B13/04; F16B21/00