Milton Plus One (1980, Sounds, Model# ??)
U. S. Patent # 4,337,948
Invented by: Jeffrey Breslow, Donald Rosenwinkel, Steven Hanson and Rex Harper
(according to the patent)
This is actually a board game that uses a pyramid shaped electronic playing piece as seen in the picture. Finding the pyramid by itself makes it look like a handheld game, so I included this here to help people that may be looking for info on this game.
Do I have this? No.