Patent drawing - Drawing of Crutch Public domain  image

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Patent drawing - Drawing of Crutch Public domain image

description

Резюме

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

29/11/1864
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Источник

The U.S. National Archives
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Информация о правах

No known copyright restrictions

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