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http://www.google.ca/patents/US3210534?utm_source=gb-gplus-share
Patent US3210534 - ENVIRONMENTAL CONTROL SYSTEM
ENVIRONMENTAL CONTROL SYSTEM
E. J. KUMP et al
Overview
Abstract
Drawings
Description
Claims
Patent number
: 3210534
Filing date
: 20 Jul 1962
Issue date
: 5 Oct 1965
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