Tomy Blip / Blip-o-Mat (1977, LED/Mechanical, 2 AA Batteries,
Model# 7018)
U. S. Patent # 4,147,350
Invented by: Hikoo Usami (Tokyo) (according to the patent)
Blip... This is a mechanical Pong-type game. All of the game play is mechanical, powered by a wind-up timer mechanism. The batteries are only there to light up the single red LED light that represents the ball. (You can actually play the game with no batteries in a bright enough setting).
Japanese version called World Tennis:
French version released by Meccatronic:
German version called Blip-o-Mat (but still just says Blip on the game itself):
Do I have this? Yes, U.S. version boxed.