Single sideband patent granted

In 1915, a patent for single sideband (SSB) modulation was granted to John Renshaw Carson, an American engineer working for AT&T. His invention, described in U.S. Patent 1,449,382, outlined the method of using only one sideband of the transmitted radio signal along with a suppressed carrier, which significantly improved the efficiency and clarity of radio transmissions. SSB modulation reduces bandwidth usage and power consumption compared to traditional amplitude modulation (AM), making it ideal for long-distance and high-fidelity communication. This innovation became especially important for amateur radio operators, commercial radio, and military communications, where efficient and reliable transmission is critical.