recently, The American telecom giant AT&T (AT&T) In conjunction with optical product developers Cheetah OMNI (abbreviation Cheetah) In a patent infringement dispute. The United States Court of Appeals for the Federal Circuit ruled on the case, That is, if a license covers a patent "Essential patent" , Then it also covers other subordinate patents that arise later.

        Not long ago, Cheetah In the United States District Court for the Northern District of Texas v AT&T Initiate a lawsuit. The company says, AT&T "manufacture, use, Offer for sale, Fiber optic equipment and services sold or imported" , Violated a U. S. patent related to its fiber optic communications network (United States patent number 7522836) .

        To this, Also listed as the defendant's telecommunications network, Product and service providers Ciena Communications (abbreviation Ciena) Put forward a motion, Because the company is AT&T Manufactures and supplies certain components of optical fiber systems, And these components are Cheetah The basis of some tort claim.

        Reprinted from China Intellectual Property Network

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