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Google and Microsoft face yet another patent lawsuit in the reputedly plaintiff-friendly Eastern District of Texas. On Tuesday, Paid Search Engine Tools LLC, a corporation based in Liberty Township, Ohio, filed a patent-infringement claim against Google and Microsoft in the Eastern District of Texas.

The company claims that Google’s AdWords and Microsoft’s AdCenter advertising services violate its "Paid Search Engine Bid Management" patent. The patent, U.S. Patent No. 7,043,450, was filed in 2002 and granted in 2006. It describes a method "for overcoming deficiencies and inefficiencies in the current paid search engine keyword bidding market, by providing keyword bidders with information they need to better optimize their use of paid search engines. The system accumulates bid amounts for a plurality of target keywords at one or more paid Internet search engines, and presents the bid amounts to a user, enabling the user to evaluate and optimize bids on those keywords." Google, Microsoft Sued Over Keyword Auction Patent — Patent Lawsuit — InformationWeek