Mobile apps maker sues 12 real estate companies

Earthcomber alleges patent infringement by Zillow, Trulia, Dominion, RealPage, others

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A company that makes mobile location-based search applications has filed suit against 12 major real estate companies, alleging patent infringement.

The company, Earthcomber, filed 10 separate complaints against the companies Jan. 18 in a federal district court in Chicago, where Earthcomber is based.