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http://www.google.com/patents/US2117236?utm_source=gb-gplus-share
Patent US2117236 - DICTATING MACHINE
DICTATING MACHINE
Theodore H. Beard et al
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Abstract
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Description
Claims
Patent number
: 2117236
Filing date
: Jun 24, 1933
Issue date
: May 10, 1938
Inventors
:
Theodore H. Beard
,
Theodore H. Beard
Current U.S. Classification
:
192/99.00S
;
369/260
;
D14/154
View patent at USPTO
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Referenced by
Citing Patent
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Issue date
Original Assignee
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