[4][5] In 1908, Parker filed his first patent, a mechanism that regulated the speed of a generator to create a constant output of electricity.

The primary patent giving Parker his entrepreneurial beginnings was filed in 1914 for his pneumatic braking system.

In 1927, having invented and patented a tubing fitting that would not leak under high pressure, Parker convinced young aviator Charles Lindbergh, who was preparing to attempt a non-stop New York-to-Paris flight, to use Parker products in the fuel system of his plane, the Spirit of St.

By then, Parker's products had gained widespread acceptance in aircraft, marine and industrial applications and the future of his business was assured.

Parker died of a heart attack on January 1, 1945, and was interred at Lake View Cemetery in Cleveland.