U.S. federal trademark · Serial No. 74613735 · Reg. No. 1989580
optical sensing system, comprised of an optical positioned encoder and signal processor, and manuals therefor, sold together as a unit, for use with hand-operated computer input devices, namely computer trackballs, mice, styluses and joysticks
Source: USPTO federal trademark records. Informational only, not legal advice. Status and details may lag the live USPTO database.