John L. Gates was the president of the Precision Equipment Company, which operated experimental station 8XB in Cincinnati, Ohio.
Seattle Daily Times, February 5, 1920, page 8:

Wireless  Concerts  Said  Coming  in  Near  Future
CINCINNATI, O., Thursday, Feb. 5.--"Wireless concerts" in which a properly equipped audience in San Francisco can sit and listen to the playing of a symphony in New York will be an innovation of the near future, in the belief of John L. Gates, wireless telephone expert.
    He bases his belief on the results of an experiment here in which wireless telephone operators within a radius of ten miles "listened in" on a phonograph record concert he gave. He reported they heard the music distinctly.