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Patent US540620 - WILLIAM W
WILLIAM W
WILLIAM W. ALEXANDER
› Overview
Abstract
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Description
Claims
Patent number
: 540620
Filing date
: Mar 24, 1890
Issue date
: Jun 11, 1895
Inventor
:
WILLIAM W. ALEXANDER
Original Assignee
:
THE GILL
Current U.S. Classification
:
340/392.2
;
178/2.00C
;
178/2.00R
;
340/6.15
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