Fujitsu Ltd. and Fujitsu Network Communications Inc. said Tuesday they have filed a patent infringement lawsuit against Tellabs Inc. and Tellabs Operations Inc. in the United States District Court for the Eastern District of Texas.
The company said it seeks monetary damages and an injunction against Tellabs’ future infringement of Fujitsu’s patents.
Fujitsu asserts that Tellabs’ products infringe four of Fujitsu’s U.S. patents covering optical communication technologies. The accused products include the Tellabs 7100 Optical Transport System, Tellabs 5500 series and Tellabs 6300 series.
The complaint follows attempts by Fujitsu to engage in cooperative discussions with Tellabs in order to resolve the issue, Fujitsu said. Since a cooperative resolution could not be reached, Fujitsu determined that litigation was necessary, the company said.
Tellabs has denied any wrong doing and said the case is without merit.
