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http://www.google.com.au/patents/US3793145?utm_source=gb-gplus-share
Patent US3793145 - MARSHALL DANN
MARSHALL DANN
Robert W. Jordan et al
Overview
Abstract
Drawings
Description
Claims
Patent number
: 3793145
Filing date
: 25 May 1971
Issue date
: 1 Feb 1974
Plain text
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