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http://www.google.ca/patents/US441805?utm_source=gb-gplus-share
Patent US441805 - ALFRED J
ALFRED J
ALFRED J. PARKER et al
› Overview
Abstract
Drawings
Description
Claims
Patent number
: 441805
Filing date
: 3 Feb 1890
Issue date
: 2 Dec 1890
Inventors
:
ALFRED J. PARKER
,
ALFRED J. PARKER
Current U.S. Classification
:
206/243
;
2/181.4
;
2/209.13
View patent at USPTO
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Drawings
Drawings
