 In 1895, Jagadish Chandra Bose demonstrated radio waves by triggering a gun and sounding a bell using microwaves transmitted over a distance of 75 feet through intervening walls.Radio innovators Guglielmo Marconi and William Preece, at a demonstration on December 12, 1896, at Toynbee Hall made a bell ring by pushing a button in a box that was not connected by any wires.In 1898 Nikola Tesla filed his patent, , named "Method of an Apparatus for Controlling Mechanism of Moving Vehicle or Vehicles", which he publicly demonstrated by radio-controlling a boat during an electrical exhibition at Madison Square Garden.