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http://www.google.com.au/patents/US1787219?utm_source=gb-gplus-share
Patent US1787219 - PEED TROTTER AND ARTHUR SWANSON
PEED TROTTER AND ARTHUR SWANSON
PEED TROTTER et al
Overview
Abstract
Drawings
Description
Claims
Patent number
: 1787219
Filing date
: 21 Apr 1927
Issue date
: 30 Dec 1930
Plain text
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