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http://www.google.com/patents/US1835031?utm_source=gb-gplus-share
Patent US1835031 - AND HERMAN A
AND HERMAN A
L. ESPENSCHIED et al
› Overview
Abstract
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Description
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Patent number
: 1835031
Filing date
: May 23, 1929
Issue date
: Dec 8, 1931
Inventors
:
L. ESPENSCHIED
,
L. ESPENSCHIED
Current U.S. Classification
:
348/14.01
;
333/244
;
370/201
View patent at USPTO
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