3D Systems Sues Quadrax in Dispute Over Patents

3D Systems Inc., a Valencia maker of machines that use a laser and chemicals to rapidly make prototype models for manufacturers, said it sued Quadrax Corp. and its Quadrax Laser Technologies unit for alleged patent infringement.

Quadrax is a Portsmouth, R.I., company that has a laser modeling system called the Mark 1000. 3D Systems’ suit was a cross-complaint to a suit filed last month by Quadrax in federal court in Providence, R.I., in which Quadrax seeks a ruling that 3D Systems’ patents are invalid.