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http://www.google.ca/patents/US3547064?utm_source=gb-gplus-share
Patent US3547064 - PLANING STEP
PLANING STEP
John P. Glass Ardmore et al
Overview
Abstract
Drawings
Description
Claims
Patent number
: 3547064
Filing date
: 21 Aug 1968
Issue date
: 1 Dec 1970
Plain text
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