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http://www.google.com.au/patents/US2711312?utm_source=gb-gplus-share
Patent US2711312 - RATIGAN
RATIGAN
James P. Ratigan et al
› Overview
Abstract
Drawings
Description
Claims
Patent number
: 2711312
Filing date
: 24 Apr 1950
Issue date
: 21 Jun 1955
Inventors
:
James P. Ratigan
,
James P. Ratigan
Current U.S. Classification
:
267/153
;
267/293
View patent at USPTO
Search USPTO Assignment Database
Referenced by
Citing Patent
Filing date
Issue date
Original Assignee
Title
US4354395
15 Dec 1980
19 Oct 1982
Shock absorption apparatus associated with well pump
US4445674
29 Apr 1982
1 May 1984
Shock absorber for an oil well pumping unit
Drawings
Drawings
Drawings
