チャールズ・サムナー・テンター
アメリカ合衆国特許第 235,496号 Photophone Transmitter, filed September 1880, issued December 1880 (with Alexander Bell)
アメリカ合衆国特許第 235,497号 Selenium Cell, filed September 1880, issued December 1880 (with Alexander Bell)
アメリカ合衆国特許第 235,616号 Process of Treating Selenium To Increase Its Electric Conductivity, filed August 1880, issued December 1880 (with Alexander Bell)
アメリカ合衆国特許第 241,909号 Photophonic Receiver, filed March 1881, issued May 1881 (with Alexander Bell)
アメリカ合衆国特許第 336,173号 Telephone Transmitter (using a "jet of conductive fluid"), filed April 1885, issued February 1886