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http://www.google.com/patents/US441993?utm_source=gb-gplus-share
Patent US441993 - FRANK K
FRANK K
FRANK K. WARD
› Overview
Abstract
Drawings
Description
Claims
Patent number
: 441993
Filing date
: Oct 21, 1890
Issue date
: Dec 2, 1890
Inventor
:
FRANK K. WARD
Current U.S. Classification
:
215/364
;
40/311
View patent at USPTO
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Drawings
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