File:Rotating drum 2379754.png: Revision history

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11 March 2022

27 November 2010

  • curprev 00:5500:55, 27 November 2010‎ imported>Madeline Schiesser‎ 520 bytes +520‎ {{Image_Details|pd |description = An example of a Rotating Drum Vacuum Filter from US Pat. 2,379,754. |author = John A. Selensky |source = United States Patent and Trademark Office |date-created = August 1, 1940 |pub-country = United States |notes = This image was published in a US patent in 1940. By virtue of being part of a published patent, it is in the public domain and its reprinting here constitutes fair use. |versions = }}
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