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http://www.google.com/patents/US3316536?utm_source=gb-gplus-share
Patent US3316536 - SINGLE CHANNEL CHARACTER SENSING APPARATUS
SINGLE CHANNEL CHARACTER SENSING APPARATUS
Douglas R. Andrews et al
Overview
Abstract
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Description
Claims
Patent number
: 3316536
Filing date
: Dec 30, 1963
Issue date
: Apr 25, 1967
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