Patent drawing - Drawing of Improved Hand Grenade Public domain  image

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Patent drawing - Drawing of Improved Hand Grenade Public domain image

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Utility Patent Drawings

Public domain photograph of a patent diagram drawings, free to use, no copyright restrictions image - Picryl description

Известные патентные рисунки из Национального архива Вашингтона.

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Дата

01/01/1864
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The U.S. National Archives
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