I can't believe that I never thought of this.
If I recall correctly, GE exhibited similar units back in the 1964 New York World's Fair.
As soon as I heard the introduction it seemed so obvious. It wouldn't be surprising to learn that for some reason it wasn't practical until now; and probably due to modern electronics. Induction heating has been used in industry for a long time.
They've been selling these over here for years! They just don't work too well with ceramic pans...
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