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http://www.google.co.uk/patents/US2942698?utm_source=gb-gplus-share
Patent US2942698 - WEIGHT OPERATED WHEEL BRAKE
WEIGHT OPERATED WHEEL BRAKE
Donald B.bolinger et al
Overview
Abstract
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Description
Claims
Patent number
: 2942698
Filing date
: 26 Apr 1957
Issue date
: 28 Jun 1960
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