1993 Contactless Magnetic-Activated Proportional Controller patent designed by Vig, Hopkins and Towne. This patent was issued by the United States Patent and Trademark Office on November 13, 1993. The Hall effect is the production of a voltage difference (the Hall voltage) across an electrical conductor, transverse to an electric current in the conductor and to an applied magnetic field perpendicular to the current. It was discovered by Edwin Hall in 1879.
All patent print and illustration pages are meticulously restored and digitally enhanced to remove as many flaws as possible while maintaining the integrity of the original document.
These fine art prints are a wonderful way to own a piece of history featuring your favorite inventions or hobbies to be proudly displayed in your home, office, business, man cave or camp.
All prints and illustrations are printed on archival heavyweight matte paper using Epson Ultrachrome K3 Pigment ink that will last over 100 years.
Select size and color from the drop-down menus. The print you receive will be high quality, printed on acid free, 60+ lb matte photo paper at high resolution. All images shown are purposefully lower quality (72dpi) for faster upload speed and to prevent others from duplicating my work.
Computer monitors may vary in color calibration, therefore your print may have a slight difference from what you see on your screen.
All orders ship in a clear protective sleeve that is inserted into a rigid envelope or tube to ensure safe delivery to your home or office.
©Blue Moon Patent Prints
1-3 business days
I'll do my best to meet these shipping estimates, but can't guarantee them. Actual delivery time will depend on the shipping method you choose.
Buyers are responsible for any customs and import taxes that may apply. I'm not responsible for delays due to customs.