File:Canadian patent 30172.djvu
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Original file (2,242 × 3,204 pixels, file size: 221 KB, MIME type: image/vnd.djvu, 10 pages)
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 03:37, 30 November 2008 | 2,242 × 3,204, 10 pages (221 KB) | T. Mazzei | {{Information |Description={{en|1=Canadian Patent No. 30172 — Method & App. for Converting & Distributing Electric Currents}} |Source=Canadian Department of Agriculture - Patent Division |Author=Nikola Tesla |Date=May 1, 1888 |Permission= |other_version |
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