Arthur Pratt Warner

Arthur Pratt Warner (April 18, 1870, Jacksonville, Florida – March 22, 1957, Beloit, Wisconsin) was an American inventor, businessman and pioneer aviator. His inventions include the electric brake and, along with his brother, the automotive speedometer.

He was the first American private citizen to purchase an airplane, the "first commercially built airplane". He paid Glenn Curtiss $6000 (equal to $ today) a disassembled one. In 1912, he sold his speedometer company for $1.2 million, equal to $ today. In 1917, the Warner Manufacturing Co. came into existence, with Warner as president, to make automobile and truck trailers. Inventions that he developed in connection with this business included the electric brake and power clutch. He retired in 1934.