Tesla's history shows that he did invent radio and that Marconi sat in his lecture/s about it. Marconi went one stop further, he made radio a commercial success. Before this, though, Tesla transmitted power for 26 miles. There are two books written about this, one by John O'Neil and the other by an English lady but I have forgotten her name. Marconi's accomplishment is that he took Tesla's idea, experimented with it and invented a practical radio that became a commercial success. Marconi knew how to market the idea while Tesla had problems with people who could have backed and supported him but they did not. That's the history of radio. Research reveals this regardless of who was the first to register the patent/s for the invention. Reading the literature of the history of radio and those people connected with it makes it clear. This is not to take away from Marconi's accomplishments because if not for Marconi, radio would only be a laboratory curiosity and a military secret. Marconi's radio saved lives, many lives. Tesla's radio was a laboratory experiment. If Tesla had properly done the patenting and worked to make it a commercial success, then we'd be talking about Tesla's radio and not Marconi's radio. In all honesty, the invention of radio is best seen as a shared invention but Marconi gets more credit for it.