5. Electric Bath Model

This is the original patent model for an Electro-Therapeutic Bathing Apparatus, invented by William W. Karshner. The patent was filed on January 25, 1859. After President George Washington established the first Patent Act, these miniature-scale models that showed how inventions worked were required by the United States Patent and Trade Office until 1880. This model was made by Wm. W. Karshner, USA, 1858.

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All images courtesy of the Bakken Museum