Last television using ultra sonic remote

[zenith2134]

Contrast this with Zenith and Panasonic. I have owned examples of both with IR remotes from 81 ad 82 respectively. Remember the Panny 19" set with the IR remote which popped into the front of the front bezel? It was a ColorPilot. That was a cool set I shouldn't have trashed. Or the 1981 Zenith 19" with the green LED channel readout and the early 'computer space command' silver remote, which pre-dated the early 80s Zeniths with the yellow LED channel numbers. The latter sets had a slightly different remote and had the controls behind a door which covered the entire right side of the tv's front.