Alexander Graham Bell's Revolutionary Invention In 1871, Bell started working on the harmonic telegraph — a device that allowed multiple messages to be transmitted over a wire at the same time. While trying to perfect this technology, which was backed by a group of investors, Bell became preoc...
Thomas A. Watson describing invention of the telephoneThomas A. Watson, assistant to Alexander Graham Bell, discussing the birth of the telephone, including the first words spoken. Despite having the patent, Bell did not have a fully functioning instrument. He first produced intelligible speech on...