The team at Unified is using Pearl to identify and chart prior art against a patent owned by Nearby Systems LLC, an NPE and entity of Empire IP LLC. Unified Patents, the top requester of ex parte reexaminations in recent years, will likely challenge its validity. The patents generally relate to displaying location-based content on a digital map on a mobile device. Nearby Systems has sued Gap, Dollar Tree, Sephora, Foot Locker, Murphy USA, Starbucks, Valvoline, Walgreens, Lululemon, Chevron, and others. For more details contact info@unifiedpatents.com.