Patent drawing - Drawing of Floating Battery Public domain image
Резюме
Utility Patent Drawings
Public domain photograph of a technical diagram, architecture, plan, free to use, no copyright restrictions image - Picryl description
Public domain photograph of a technical diagram, architecture, plan, free to use, no copyright restrictions image - Picryl description
Известные патентные рисунки из Национального архива Вашингтона.
Теги
Дата
01/04/1862
Источник
The U.S. National Archives
Информация о правах
No known copyright restrictions