Jelaskan Paten lianna dari Frank Gray (panalungtik) dalam bahasa sunda

Bareng jeung Herbert E. Ives minangka pamanggih bareng, Gray ngoropakkeung dua paten AS taun 1927: "Electro-optical system" (US 2,037,471, issued Apr. 14, 1936) jeung "Electro-optical transmission" (US 1,759,504, issued May 20, 1930), sarta hiji nu maké ngaranna: "Television system" (US 2,113,254, issued Apr. 5 1938). anjeunna matenkeun loba timuan nu meh sarua lianna sababaraha taun satuluyna.