Public domain photograph of an automobile, 1910s car, free to use, no copyright restrictions image - Picryl description
Public domain photograph of electric power generation, power lines, free to use, no copyright restrictions image - Picryl description
Public domain scan of the book page, free to use, no copyright restrictions image - Picryl description
Public domain scan of artwork related to technological or industrial history, free to use, no copyright restrictions image - Picryl description
Public domain photograph of American trade card, no copyright restrictions image - Picryl description
Public domain photograph of industrial architecture, factory building, free to use, no copyright restrictions image - Picryl description
Public domain scan of architectural drawing, architecture, free to use, no copyright restrictions image - Picryl description