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http://www.google.ca/patents/US1774869?utm_source=gb-gplus-share
Patent US1774869 - RATGHET-BAE-ACTUATING MECHANISM
RATGHET-BAE-ACTUATING MECHANISM
Overview
Abstract
Drawings
Description
Claims
Patent number
: 1774869
Filing date
: 1 Mar 1928
Issue date
: 2 Sep 1930
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