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Patent Drawing of Engine - US390721 Public domain  image
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Patent Drawing of Engine - US390721 Public domain image

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Public domain scan of technical drawing, 19th-20th-century, free to use, no copyright restrictions image - Picryl description

Nikola Tesla (1856–1943) Serbian American inventor and engineer who discovered and patented the rotating magnetic field, the basis of most alternating-current machinery. He also developed the three-phase system of electric power transmission. He immigrated to the United States in 1884 and sold the patent rights to his system of alternating-current dynamos, transformers, and motors to George Westinghouse.

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1900
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USPTO
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US390721 - Public domain portrait drawing : Beautiful Novelty Ceramic Coffee Mug 11ozUS390721 - Public domain portrait drawing : Large Organizer Pouch with Black ZipperUS390721 - Public domain portrait drawing : Essential Tote Bag for Everyday UseUS390721 - Public domain portrait drawing : Large 3 Inch Pin Buttons with Crisp DesignUS390721 - Public domain portrait drawing : High Quality Matte Wall Art Poster for Home, Office, ClassroomUS390721 - Public domain portrait drawing : Spiral Bound Ruled Notebook with Printed CoverUS390721 - Public domain portrait drawing : Laminated UV Protective Vinyl StickersUS390721 - Public domain portrait drawing : Decorative Accent Square Pillow

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