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http://www.google.ca/patents/US1214974?utm_source=gb-gplus-share
Patent US1214974 - CULTIVATOR-STANDARD
CULTIVATOR-STANDARD
WILLIAM A. F. URBAN et al
› Overview
Abstract
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Description
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Patent number
: 1214974
Filing date
: 18 Apr 1916
Issue date
: 6 Feb 1917
Inventors
:
WILLIAM A. F. URBAN
,
WILLIAM A. F. URBAN
Current U.S. Classification
:
172/271
;
172/739
View patent at USPTO
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Referenced by
Citing Patent
Filing date
Issue date
Original Assignee
Title
US4825957
12 Aug 1986
2 May 1989
Deere & Company
Breakaway mechanism for a row marker
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