Atari Epic Games, Valve, Sierra, SCEJ, SCEA and Sony Online Entertainment settle with iEntertainment Network for $175,000

Text of Patent
In December 2004 filed a suit against Atari, Epic, Valve, Sierra and multiple divisions of Sony, including Sony Online Entertainment. The complaint referred to an infringement of patent 6,042,477 (method of and system for minimizing the effects of time latency in multiplayer electronic games played on interconnected computers).

Sources: GameDaily.biz | Gamasutra | Next Generation