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I know that Sony (or Somy if you watch enough anime to notice that anime producers subsitute one letter out on name brand products to avoid the copyright issue) used utlrasonic remotes on their Trinitron TVs up until the late 1980s.
I know because my aunt lived in an old house in Fort Wayne, Indiana for a while that used to be owned by an older gentleman that when he moved out left a lot of stuff behind including a 1987 vintage Sony Trinitron Color Television that had the old push-button style tuner (the one where you had to use a special plastic "screwdriver" to set the channels), and it had its original Ultrasonic Remote with it and it took 2 "AA" batteries to run it and it had a power button, channel up and down, volume up and down, and a mute button.
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