Title:
Mechanical product and method of producing the same
United States Patent 1830747


Inventors:
Bray, Nelson H.
Application Number:
US36336629A
Publication Date:
11/10/1931
Filing Date:
05/15/1929
Assignee:
Bray, Nelson H.
Primary Class:
Other Classes:
238/150
International Classes:
E01B5/08; E01B31/18
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