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http://www.google.com.au/patents/US3572551?utm_source=gb-gplus-share
Patent US3572551 - APPARATUS FOR MONITORING AND CONTROLLING
APPARATUS FOR MONITORING AND CONTROLLING
Gillespie Moorestown; Ralph Herman et al
Overview
Abstract
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Description
Claims
Patent number
: 3572551
Filing date
: 27 Mar 1969
Issue date
: 30 Mar 1971
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