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http://www.google.com.au/patents/US1871843?utm_source=gb-gplus-share
Patent US1871843 - ATTORNW
ATTORNW
BICHABD EBICSON et al
Overview
Abstract
Drawings
Description
Claims
Patent number
: 1871843
Filing date
: 17 Oct 1928
Issue date
: 16 Aug 1932
Plain text
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