found: Wikipedia, website viewed November 10, 2017(Spartan Aircraft Company; American aircraft manufacturing company headquartered on Sheridan Aveneu near the Tulsa Municipal Airport in Tulsa, Oklahoma; previously known as Mid-Continent Aircraft Company; reorganized under the Spartan name in 1928 by oil baron William G. Skelly; operated until 1961, manufacturing aircraft, aircraft components, and recreational vehicle trailers; the company was known for the luxurious Spartan Executive aircraft produced in the late 1930s and early 1940s--made prominent by owners such as Howard Hughes and King Ghazi of Iraq; J. Paul Getty acquired the company from Skelly in 1935; after World War II, Getty ended aircraft production and converted the company to manufacturing trailers under the Spartan Manor brand, subsequently ending all production in 1961)