On December 14, 1900, the U.S. Standard Voting Machine Company was formed, with Alfred Gillespie as one of its directors, to combine the companies that held the Myers, Davis, and Gillespie patents. By the 1920s, this company (under various names) had a monopoly on voting machines, until, in 1936, Samuel and Ransom Shoup obtained a patent for a competing voting machine. By 1934, about a sixth of all presidential ballots were being cast on mechanical voting machines, essentially all made by the same manufacturer.