NEW YORK — Sumitomo Electric Industries infringed on two Corning Glass Works patents for fiber optics, but not on a third, a federal judge ruled Tuesday.
U.S. District Judge William C. Conner ordered the Japanese company to stop making or selling the affected optical wave guide fibers, which are thin strands of glass used in telecommunications to transmit such things as telephone calls and computer data.
Sumitomo also was found liable for monetary damages, but the judge said the amount would be determined at a later trial.
Conner ruled Sumitomo infringed on two of Corning's patents for the structure and composition of the optic fibers. He found Sumitomo had not infringed on a more recent Corning patent covering a process for producing such fibers.