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Patent US224573 - MICROPHONE
MICROPHONE
EBIILE BEELINEE
› Overview
Abstract
Drawings
Description
Claims
Patent number
: 224573
Filing date
: Sep 5, 1870
Issue date
: Feb 17, 1880
Inventor
:
EBIILE BEELINEE
Current U.S. Classification
:
381/180
;
381/178
;
381/354
View patent at USPTO
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Drawings
Drawings
