Fujitsu Limited and Fujitsu Network Communications announced a patent infringement lawsuit asserting 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. Fujitsu said its complaint follows numerous attempts by Fujitsu to engage in cooperative discussions with Tellabs.
“Fujitsu has been investing heavily for years in research and development and owns approximately 10,000 patents in the field of optical communications around the world,” said Masanobu Katoh, corporate vice president and president of the Law & Intellectual Property Unit of Fujitsu Limited. “In this field, Fujitsu is a leader and has patents that are important to optical communication technologies such as Synchronous Optical Networking (SONET), Synchronous Digital Hierarchy (SDH), and Dense Wavelength Division Multiplexing (DWDM).”http://us.fujitsu.com/telecom
