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Description
English: Sketch of Ferrata's Piano Attachment Invention from US Patent 644244. The patent was granted in 1900. This photo was extracted from: File:US644244.pdf
Date
Source This photo shows the figures from the United States Patent which is already on Wikimedia Commons as: File:US644244.pdf
Author United States Patent Office

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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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The patent was granted in 1900 and is not copyrighted.

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Sketch of Ferrata's Piano Attachment Invention from US Patent 644244

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current15:18, 11 March 2022Thumbnail for version as of 15:18, 11 March 2022970 × 1,498 (407 KB)NolabobUploaded a work by United States Patent Office from This photo shows the figures from the United States Patent which is already on Wikimedia Commons as: File:US644244.pdf with UploadWizard

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