De Forest, Lee. (1873-1961) American Inventor, holder of more than 300 patents, known as the "Father of Radio" and "Grandfather of Television." Inscribed Business Card Signed. 3½ x 2", on cream card stock. Penned on verso "To John D. Libby Jr./ from Lee de Forest./ Oct. 14 '39."
Estimated Value $300-450.
