Multi-player multi-character cooperative play video game with independent player entry and departure

U.S. Patent No. 4,738,451: Multi-player, multi-character cooperative play video game with independent player entry and departure

U.S. Patent No. 4,738,451: Multi-player, multi-character cooperative play video game with independent player entry and departure Issued April 19, 1988, to Atari Games Corp. Priority Date May 20, 1986 Summary: U.S. Patent…