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http://www.google.com/patents/US1416061?utm_source=gb-gplus-share
Patent US1416061 - KADIOBECBIVING SYSTEM HAVING HIGH SELECTIVITY
KADIOBECBIVING SYSTEM HAVING HIGH SELECTIVITY
M. I. PUPIN
› Overview
Abstract
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Description
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Patent number
: 1416061
Filing date
: Dec 18, 1917
Issue date
: May 16, 1922
Inventor
:
M. I. PUPIN
Current U.S. Classification
:
375/338
;
307/105
View patent at USPTO
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