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http://www.google.com/patents/US1334165?utm_source=gb-gplus-share
Patent US1334165 - AND EDWIN H
AND EDWIN H
M. I. PUPIN
› Overview
Abstract
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Description
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Patent number
: 1334165
Filing date
: Sep 17, 1915
Issue date
: Mar 16, 1920
Inventor
:
M. I. PUPIN
Current U.S. Classification
:
455/291
;
333/217
;
455/289
View patent at USPTO
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