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http://www.google.com/patents/US2035298?utm_source=gb-gplus-share
Patent US2035298 - AUGER BIT
AUGER BIT
John W. Caldwell et al
Overview
Abstract
Drawings
Description
Claims
Patent number
: 2035298
Filing date
: Jul 14, 1932
Issue date
: Mar 24, 1936
Plain text
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