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http://www.google.co.uk/patents/US2104323?utm_source=gb-gplus-share
Patent US2104323 - PORTABLE DRILLING RIO
PORTABLE DRILLING RIO
C. A. HIRSCHBERG et al
› Overview
Abstract
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Description
Claims
Patent number
: 2104323
Filing date
: 18 Aug 1934
Issue date
: 4 Jan 1938
Inventors
:
C. A. HIRSCHBERG
,
C. A. HIRSCHBERG
Current U.S. Classification
:
173/187
;
173/42
;
248/647
;
280/47.24
;
280/47.33
;
414/680
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Referenced by
Citing Patent
Filing date
Issue date
Original Assignee
Title
US5820143
9 May 1997
13 Oct 1998
Recycler trolley
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