File:William A. Barry 1917 collapsible drum patent.jpg

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Description
English: Drawing of a Collapsible drum patent from William A. Barry.
Date
Source U.S. Patent 1223237
Author William F. Ludwig
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 In general, the contents of United States patents are in the public domain.

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A portion of the disclosure of this patent document contains material which is subject to (copyright or mask work) protection. The (copyright or mask work) owner has no objection to the facsimile reproduction by any­one of the patent document or the patent disclosure, as it appears in the Patent and Trademark Office patent file or records, but otherwise reserves all (copyright or mask work) rights whatsoever.

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current15:44, 1 October 2012Thumbnail for version as of 15:44, 1 October 20121,196 × 1,589 (387 KB)Lobo (talk | contribs){{Information |Description={{en|Drawing of a ''Collapsible drum'' patent from William A. Barry.}} |Source=U.S. Patent 1223237 |Date={{date|1917|04|17}} |Author=William F. Ludwig |Permission={{PD-US-patent}} |other_versions= }} [[Category:U.S. Patent dr...

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