Graham Bell's patent

Alexander Graham Bell's patent, granted in 1876, protected his invention of the telephone, which enabled voice communication over long distances. The patent covered a device that could transmit sound by converting sound waves into electrical signals using a diaphragm and a magnetic coil. This innovation allowed people to talk to each other in real time across distances, fundamentally changing communication technology. Bell's patent was crucial in establishing his rights to the invention, leading to the development and commercialization of the telephone industry.