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http://www.google.com.au/patents/US3009738?utm_source=gb-gplus-share
Patent US3009738 - PIKER
PIKER
Herbert Piker et al
Overview
Abstract
Drawings
Description
Claims
Patent number
: 3009738
Filing date
: 18 Apr 1960
Issue date
: 21 Nov 1961
Plain text
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