Prolific American inventor (1873–1961) often referred to as ‘the father of radio’ for his pioneering work in wireless telegraphy. Bank check, 6.25 x 2.75, filled out and signed by de Forest, payable to Pure Oil Service Station for $1.30, October 6, 1948. In fine condition, with expected bank stamps and cancellation holes (approaching but not affecting the signature). RR Auction COA.
