Cameron_Ram-type_Blowout_Preventer_(1922)_-_plan_view.jpg
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Summary
Description Cameron Ram-type Blowout Preventer (1922) - plan view.jpg |
English:
Cameron Ram-type Blowout Preventer (1922)
U.S. Patent 1,569,247. Text was removed from figure and minor cleanup of the scan was done with Microsoft Paint.
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Date | ||||
Source |
US patent number 1569247 from
http://patft.uspto.gov/netahtml/PTO/srchnum.htm
:
English:
Instructions: browse to
http://patft.uspto.gov/netahtml/PTO/srchnum.htm
; enter 1569247; click Search button; click Images button; in Go to Page field enter "2" and click Go button.
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Author | James S. Abercrombie and Harry S. Cameron | |||
Permission
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Licensing
Public domain Public domain false false |
This work is in the
public domain
in the
United States
because it was
published
(or registered with the
U.S. Copyright Office
) before January 1, 1929.
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Note: This tag should not be used for sound recordings. PD-1923 Public domain in the United States //commons.wikimedia.org/wiki/File:Cameron_Ram-type_Blowout_Preventer_(1922)_-_plan_view.jpg |