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http://www.google.com.au/patents/US1863309?utm_source=gb-gplus-share
Patent US1863309 - MOTION PICTURE PROJECTOR
MOTION PICTURE PROJECTOR
HOWABD L. KITTS et al
Overview
Abstract
Drawings
Description
Claims
Patent number
: 1863309
Filing date
: 5 Apr 1930
Issue date
: 14 Jun 1932
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