• F. J. Duarte, Optical device for rotating the polarization of a light beam, US Patent 4822150 (18th of April, 1989).
• F. J. Duarte, Laser oscillator, US Patent 5181222 (19th of January, 1993).
• F. J. Duarte, Electro-optical interferometric microdensitometer system, US Patent 5255069 (19th of October, 1993).
• F. J. Duarte, Laser sensitometer using multiple-prism beam expansion and a polarizer, US Patent 6236461 (22nd of May, 2001).
• F. J. Duarte, B. A. Reed, and C. J. Burak, Laser sensitometer, US Patent 6903824 (7th of June, 2005).

Note: the patents described as laser sensitometer provide the dual description of a laser printer. In them, laser beams are used to write on photo sensitive imaging materials. US Patent 6903824 refers to a multiple-wavelength high-speed laser system that exposes imaging materials in the nanosecond regime. All these patents have been reduced to practice.

Page published on the 4th of January, 2002

Updated on the 7th of July, 2006