File:Nick Kopp Patent 20566 Closed Vessel with Perforated Cover.png

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Nick_Kopp_Patent_20566_Closed_Vessel_with_Perforated_Cover.png(410 × 336 pixels, file size: 83 KB, MIME type: image/png)

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current18:16, 21 August 2023Thumbnail for version as of 18:16, 21 August 2023410 × 336 (83 KB)commons>TwoScarsUpUploaded a work by Nicholas Kopp from This is an illustration from the seven-year patent granted to Nicholas Kopp of Fostoria, Ohio. The United States Patent Office granted the patent March 10, 1891. with UploadWizard

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