1. a Epson Research and Development, Inc. , 150 River Oaks Parkway, Suite 225, San Jose, CA 95134, USA
2. b Seiko Epson Corporation , 281 Fujimi, Fujimi-machi, Nagano-ken, 399-0293, JAPAN
3. c Symetrix Corporation , 5055 Mark Dabling Blvd., Colorado Springs, CO, 80918, USA