Title:
Block device
United States Patent 3413812


Inventors:
Fox, Kirk H.
Application Number:
US66466667A
Publication Date:
12/03/1968
Filing Date:
08/31/1967
Assignee:
GATES & FOX CO INC
Primary Class:
Other Classes:
248/72, 248/351, 248/357
International Classes:
E21D11/18
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