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http://www.google.com.au/patents/US2143214?utm_source=gb-gplus-share
Patent US2143214 - PRODUCTION OF IMAGES
PRODUCTION OF IMAGES
Pan! Selenyi et al
Overview
Abstract
Drawings
Description
Claims
Patent number
: 2143214
Filing date
: 20 Mar 1935
Issue date
: 10 Jan 1939
Plain text
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