Guglielmo Marconi is credited as the inventor of the Radio but Nicola Tesla created a working prototype years earlier but never patented it as it was just one part of a larger project he was working on. Marconi actually used some of Tesla's designs directly in his radio. So Nicola Tesla invented a "radio" used as prototype in his wireless power transmission experiment in 1893 while Marconi patented and presented his radio in 1895. Even though it was Tesla's designs and concept, one could argue that Marconi delivered the radio as an actual concept by using it to transmit and receive telegraphs.