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http://www.google.com/patents/US3299681?utm_source=gb-gplus-share
Patent US3299681 - PROGRAM CONTROLLED TUBE BENDER
PROGRAM CONTROLLED TUBE BENDER
Charles F. Hautau et al
Overview
Abstract
Drawings
Description
Claims
Patent number
: 3299681
Filing date
: Mar 22, 1960
Issue date
: Jan 24, 1967
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