June 13 – Charles Francis Jenkins achieves the first synchronized transmission of pictures and sound, using 48 lines, and a mechanical system. A 10-minute film of a miniature windmill in motion is sent across 5 miles from Anacostia to Washington, DC. The images are viewed by representatives of the Bureau of Standards, the U.S. Navy, the Department of Commerce and others. Jenkins calls this "the first public demonstration of radiovision".
October 2 – John Logie Baird successfully transmits the first television pictures with a greyscale image, in London.[5]
^Burns, R. W. Television: An International History of the Formative Years. London: Institution of Electrical Engineers. p. 264. ISBN9780852969144.
^U.S. Patent 1,745,175Method and apparatus for controlling electric currents, first filed in Canada, describing a device similar to a MESFET. Granted 28 January 1930. Lee, Thomas H. (2004). The Design of CMOS Radio-Frequency Integrated Circuits (New ed.). Cambridge University Press. pp. 167ff. ISBN9780521835398.