Intergraph Suing Computer Makers

Intergraph Corp., which settled a lawsuit accusing Intel Corp. of using its technology without permission, is suing Dell Computer Corp., Hewlett-Packard Co. and Gateway Inc. for patent infringement.

The computer-server and software company filed suit in Texas against the three largest U.S. makers of personal computers, saying their products infringe its “clipper” chip patents, the company said.

Dell is the largest U.S. personal computer maker, followed by HP and Gateway.