Tesla Patent Prints - Set of 4 - UNFRAMED Blackboard 8" X 10" Poster Art Perfect for the collector, makes a Great Gift for any Tesla enthusiast. Size 8" X 10" Prints (Unframed) Enhanced reproduction of the original patent art work. Handmade in the USA with the Highest Quality Inks and Papers. FREE SHIPPING IN THE USA! via USPS First Class Mail.