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http://www.google.com/patents/US1164274?utm_source=gb-gplus-share
Patent US1164274 - TELEGRAPH-REPEATER
TELEGRAPH-REPEATER
W. FINN
› Overview
Abstract
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Description
Claims
Patent number
: 1164274
Filing date
: Feb 3, 1915
Issue date
: Dec 14, 1915
Inventor
:
W. FINN
Original Assignee
:
THE WESTERN UNION TELEGRAPH COMPANY
Current U.S. Classification
:
178/71.13
View patent at USPTO
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