[1][2][3] In 1925, one of the pioneers of television Boris Rosing advised and helped him apply for a patent (issued under No 5592) of a fully electronic TV set called Telefot.
In his method patented in 1925, Grabovsky proposed a new principle of the TV imaging based on the vertical and horizontal electron beam sweeping under high voltage that is widely used in the modern cathode-ray tubes.
[2] Although this date of demonstration of the fully electronic TV set is the earliest known so far, most of the modern historians claim that either Vladimir Zworykin[6] or Philo Farnsworth[7] were supposedly first.
Boris Grabovsky was born in 1901 in Tobolsk, Siberia, where his father, a prominent Ukrainian poet Pavlo Hrabovsky was living in exile as a member of the Russian revolutionary movement Narodnaya Volya.
Ukrainian scientists (with Boris Grabovsky) are presented with Maxwell, Heinrich Hertz, Guglielmo Marconi, Nikola Tesla, Alexander Stepanovich Popov.