April 30, 1904
German inventor Christian Hülsmeyer is granted patent DE 165546 for the “telemobiloscope,” the first device to detect objects via reflected radio waves. It is publicly demonstrated May 17, 1904 in Cologne.
German inventor Christian Hülsmeyer is granted patent DE 165546 for the “telemobiloscope,” the first device to detect objects via reflected radio waves. It is publicly demonstrated May 17, 1904 in Cologne.