Hall and Bert C. Scott to manufacture engines for automobiles and later expanded the production of engines for trucks and airplanes as well as gasoline-powered rail cars and locomotives. Hall was a mechanic and engine builder and Scott, Stanford University-educated, was the business executive.
Hall and Bert C. Scott were involved in producing engines for automobiles initially, and they later expanded their production to include engines for trucks, airplanes, gasoline-powered rail cars, and locomotives. Hall was a mechanic and engine builder while Scott, with a Stanford University education, managed the business side.