Wiltron, a small maker of test equipment, filed suit against Hewlett-Packard on Wednesday, charging the industry giant with violating antitrust laws in monopolizing the $110-million-a-year market for a type of microwave analysis equipment.
Wiltron, which is based in Morgan Hill, Calif., said it brought the suit after Hewlett-Packard claimed that Wiltron was infringing H-P patents and threatened to bring a lawsuit of its own against Wiltron.
Hewlett-Packard officials in Palo Alto declined immediate comment, saying that their attorneys had not had a chance to review Wiltron's complaint.
Microwave vector network analyzers, the equipment at issue in the suit, are sophisticated instruments that measure the characteristics of microwaves emitted by or passing through a wide range of devices. They can be used to test everything from microwave telephone transmissions to radar installations to the cooking accuracy of microwave ovens.