Before revision: 792-793, New York: D. Appleton, 1877 Company, 1962, pp.
After revision: The first duplexers for radar, sometimes referred to as Transmit/Receive Switches, were invented by Robert Morris Page and Leo C. Young of the United States Naval Research Laboratory in July of 1936.Page, Robert Morris; The Origin of Radar, Doubleday792-793, New York: D. Appleton, 1877 Company, 1962, pp.