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http://www.google.com.au/patents/US3809199?utm_source=gb-gplus-share
Patent US3809199 - SHEET OF
SHEET OF
Pierre Etienne Bessiere et al
Overview
Abstract
Drawings
Description
Claims
Patent number
: 3809199
Filing date
: 30 Nov 1972
Issue date
: 1974
Plain text
PDF
