Google and Microsoft showed a rare instance of cooperation this week in a newly discovered lawsuit launched in an attempt to shut down patent troll GeoTag. The Delaware-based suit asks the court to invalidate GeoTag's lone patent, a 1996 claim to an "Internet organizer for accessing geographically and topically based information," based on the existence of prior art. GeoTag has sued 397 different companies across ten different complaints covering the online store locators of many retailers, most of which aren't technology firms but do include AT&T, GameStop and Radi