File:OJ Zobel signature.png

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OJ_Zobel_signature.png(446 × 164 pixels, file size: 3 KB, MIME type: image/png)

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current09:18, 5 December 2023Thumbnail for version as of 09:18, 5 December 2023446 × 164 (3 KB)commons>Materialscientist{{Information |Description=Zobel's signature in his draughtsmanlike hand as it appears on a patent application |Source=US Patent 1557229 |Date=1925-10-13 |Author=O J Zobel |Permission={{PD-US}} |other_versions= }} Category:Otto Julius Zobel

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