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http://www.google.com.au/patents/US938741?utm_source=gb-gplus-share
Patent US938741 - MACHINE
MACHINE
CHARLES E. CAMPBELL et al
› Overview
Abstract
Drawings
Description
Claims
Patent number
: 938741
Issue date
: 2 Nov 1909
Inventors
:
CHARLES E. CAMPBELL
,
CHARLES E. CAMPBELL
Current U.S. Classification
:
83/167
;
83/585
;
83/607
;
83/912
;
144/146
View patent at USPTO
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Referenced by
Citing Patent
Filing date
Issue date
Original Assignee
Title
US4510841
9 Dec 1983
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International Business Machines Corporation
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US5974929
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Drawings
Drawings
