Radios were invented in the late 19th century, with several key contributors involved. Nikola Tesla demonstrated the first wireless radio in 1893 in St. Louis, Missouri. However, Guglielmo Marconi is often credited as the inventor of radio, as he was awarded the first patent for a wireless radio device in England in 1896 and successfully transmitted radio signals across the Atlantic Ocean by 1901. The invention of radio communication built upon theoretical and experimental work by scientists like James Clerk Maxwell, Heinrich Hertz, and others through the late 1800s.