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http://www.google.com.au/patents/US3308898?utm_source=gb-gplus-share
Patent US3308898 - VIBRATED FLOW CONTROL VALVE AND WEIGHER
VIBRATED FLOW CONTROL VALVE AND WEIGHER
Chester H. Harper et al
Overview
Abstract
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Description
Claims
Patent number
: 3308898
Filing date
: 14 Feb 1963
Issue date
: 14 Mar 1967
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