The Harroun Motors Corporation raised $10,000,000 in stock to begin a car company.
Harroun bought the buildings and equipment of the former Prouty and Glass Carriage Company in 1916 for $40,000.
In 1918, Harroun invented and patented a shock absorbing steering wheel to reduce driver fatigue.
In the spring of 1918, the company got a government contract to produce 200,000 artillery shells during World War I.
Harroun produced 23,899 155 mm howitzer high-explosive, Mark I, Type B shells for the war.