Navy Admiral (1854–1942) known for his technical innovations and electrical and mechanical inventions. ALS, one page, 5 x 6.5, personal letterhead, July 15, 1917. “I invented the torpedoplane in Washington in the summer of 1911. I applied for a patent in April, 1912. The patent was issued on July 16, 1912.” In fine condition. RRAuction COA.
