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http://www.google.co.uk/patents/US1713601?utm_source=gb-gplus-share
Patent US1713601 - OPENFH
OPENFH
CAUL C. HARRIS et al
Overview
Abstract
Drawings
Description
Claims
Patent number
: 1713601
Filing date
: 4 May 1927
Issue date
: 21 May 1929
Plain text
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