Before revision: Scott-Taggart, Thermionic Tubes in Radio Telegraphy and Telephony, London, UK: The Wireless Press LTD, 1921, p. 118 First use of a resistance in the grid circuit of a vacuum tube detector circuit may have been by Sewall Cabot in 1906.
After revision: Scott-Taggart, Thermionic Tubes in Radio Telegraphy and Telephony, London, UK: The Wireless Press LTD, 1921, p. 118Stone, J. S., Cabot, S., Space Telegraphy, U. S. patent 884,110, April 1908 First use of a resistance in the grid circuit of a vacuum tube detector circuit may have been by Sewall Cabot in 1906.