Silver State Intellectual Technologies (SSIT) [NPE] filed suit against Foursquare Labs, alleging that Foursquare’s location-based social networking system infringes two patents related to the publication of GPS coordinates.  SSIT previously filed two suits against Garmin and TomTom in September 2011 over seven patents related to interactive navigation devices that incorporate user preferences.  The patents-in-suit originated with American Calcar before being assigned to SSIT in September 2011.  7/25, District of Nevada, 2:2012cv01308.