File:Cameron Ram-type Blowout Preventer (1922).jpg
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[edit]DescriptionCameron Ram-type Blowout Preventer (1922).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 n° 1,569,247 | |||
Author | James S. Ambercrombie and Harry S. Cameron | |||
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[edit]Public domainPublic domainfalsefalse |
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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-1923Public domain in the United States//commons.wikimedia.org/wiki/File:Cameron_Ram-type_Blowout_Preventer_(1922).jpg |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 04:09, 20 December 2011 | ![]() | 2,026 × 1,493 (686 KB) | Jbarta (talk | contribs) | clean up |
20:11, 9 May 2010 | ![]() | 2,026 × 1,493 (323 KB) | KudzuVine (talk | contribs) | {{Information |Description={{en|1=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 {{PD patents}}}} |Source=http://patimg1.uspto.gov/.piw?Docid=015692 |
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