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http://www.google.com.mx/patents/US3835245?utm_source=gb-gplus-share
Patent US3835245 - CO-ORDS
CO-ORDS
Leon Andre Pieters et al
Overview
Abstract
Drawings
Description
Claims
Patent number
: 3835245
Filing date
: 7 Aug 1972
Issue date
: 1 Sep 1974
Plain text
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