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Patent US1488514 - SYLVANIA
SYLVANIA
MICHAEL IDVORSKY IPUPIN
› Overview
Abstract
Drawings
Description
Claims
Patent number
: 1488514
Filing date
: Oct 10, 1918
Issue date
: Apr 1, 1924
Inventor
:
MICHAEL IDVORSKY IPUPIN
Original Assignee
:
WESTING
Current U.S. Classification
:
330/53
;
330/67
;
330/112
;
330/190
View patent at USPTO
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