Found it (on paper): "Generating
characters" by Kenneth Perry and
Everett Aho, > Electronics, Jan 3, 1958, pp. 72-75.
> Bitsavers has it in the MIT/LincolnLaboratory section:
Very interesting. Here's a link to the patent for the display system
magazine in early 1958 that you found. Your memory is incredible to have
been able to have this pop into your mind when you read my description of
the way the calculator generates its display.