RealD
US patent 7477206, "Enhanced ZScreen modulator techniques", issued January 13, 2009, assigned to RealD
US patent 6975345, "Polarizing modulator for an electronic stereoscopic display", issued December 13, 2005, assigned to StereoGraphics Corporation
US patent 5481321, "Stereoscopic motion picture projection system", issued January 2, 1996, assigned to Lenny Lipton
US patent 4884876, "Achromatic liquid crystal shutter for stereoscopic and other applications", issued December 5, 1989, assigned to Lenny Lipton
US patent 4792850, "Method and system employing a push-pull liquid crystal modulator", issued December 20, 1988, assigned to StereoGraphics Corporation