Coba jelasin Telephone operating companies dari Telepon dalam bahasa sunda dong

Kontol Gede Dasar Tholol Anjing Bangsat Stupid PBB Idiot Donald Trumpangan

US 174,465  -- Telegraphy (Bell's first telephone patent) -- Alexander Graham Bell

US 186,787  -- Electric Telegraphy (permanent magnet receiver) -- Alexander Graham Bell

US 474,230  -- Speaking Telegraph (graphite transmitter) -- Thomas Edison

US 203,016  -- Speaking Telephone (carbon button transmitter) -- Thomas Edison

US 222,390  -- Carbon Telephone (carbon granules transmitter) -- Thomas Edison

US 485,311 -- Telephone (solid back carbon transmitter) -- Anthony C. White (Bell engineer) This design was used until 1925 and installed phones were used until the 1940s.

US 3,449,750  -- Duplex Radio Communication and Signalling Appartus—G. H. Sweigert

US 3,663,762  -- Cellular Mobile Communication System—Amos Edward Joel (Bell Labs)

US 3,906,166  -- Radio Telephone System (DynaTAC cell phone) -- Martin Cooper et al. (Motorola)