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Michel A Duguay: Two-dimensional optoelectronic tune-switch. Universite Laval, Oblon Spivak McClelland Maier & Neustadt P C, September 23, 1997: US05671304 (173 worldwide citation)

A communications switch for switching telecommunications signals from input wavelength division multiplexed (WDM) optical fibers to output WDM optical fibers is disclosed. A two-dimensional optoelectronic switch is also described which uses tunable lasers and optical diffractive elements to switch a ...


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Clement M Gosselin, Thierry Laliberte: Underactuated mechanical finger with return actuation. Universite Laval, James Anglehart, Swabey Ogilvy Renault, June 9, 1998: US05762390 (59 worldwide citation)

This invention provides a finger with three phalanges and three degrees of freedom for a flexible and versatile mechanical gripper which uses only a limited number of actuators. The finger is robust, can provide large grasping forces and can perform power grasps as well as pinch grasps. The mechanis ...


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Jean Serodes, Manuel Rodriguez: Method of predicting residual chlorine in water supply systems. Universite Laval, Foley & Lardner, October 7, 1997: US05675504 (55 worldwide citation)

A method of configuring an artificial neural network for predicting residual chlorine concentration in water contained in a storage tank of a water supply system, the storage tank having an inlet for admitting water into the tank and an outlet for discharging water from the tank. The method of the i ...


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Luc Janelle, Claude Lague, Sylvio Tessier: Hydraulic floating system for downpressure control of seeding tools. Universite Laval, Klauber & Jackson, October 8, 1996: US05562165 (53 worldwide citation)

A hydraulic downpressure system for use on no-tillage seeders allows for a constant downward force to be applied on seeding tools operating in highly variable soil surface conditions in order to keep a uniform seeding or planting depth. Raising and lowering of the seeding units can also be achieved ...


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Charles J Doillon, Krystina Pietrucha, Rene C Gaudreault: Biostable porous material comprising composite biopolymers. Universite Laval Cite Universitaire, Schwegman Lundberg Woessner & Kluth P A, January 26, 1999: US05863984 (49 worldwide citation)

Biomaterials like collagen can be designed for use as scaffolds for connective tissue reconstruction. It is known that proteins conjugated with PEGs exhibit a decrease in their biodegradation rate and their immunogenicity. Different concentrations and molecular weights of PEGs (PEG-750 and PEG-5000) ...


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Christian Roy: Vacuum pyrolysis of scrap tires. Universite Laval, Schwartz Jeffery Schwaab Mack Blumenthal & Evans, April 26, 1988: US04740270 (46 worldwide citation)

A process for the treatment of used rubber tires by vacuum pyrolysis in a reactor to produce liquid and gaseous hydrocarbons and a solid carbonaceous material is disclosed. According to the invention, the pyrolysis of the tires is carried out at a temperature in the range of about 360.degree. C. to ...


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Paul Paquin, Johanne Lacasse, Muriel Subirade, Sylvie Turgeon: Continuous process of dynamic high-pressure homogenization for the denaturation of proteins. Universite Laval, France Côté, Christian Cawthorn, Swabey Ogilvy Renault, January 28, 2003: US06511695 (40 worldwide citation)

The present invention relates to a continuous process for denaturation of proteins, which comprises the steps of: a) subjecting a protein solution to a high pressure homogenizer at a pressure of about 500 to about 5000 bar, at a recirculation ranging from 0 to about 50 and at a temperature ranging f ...


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Real Tremblay: Electromagnetic wave concentrator. Universite Laval, Robic Robic & Associates, March 19, 1985: US04505264 (39 worldwide citation)

Electromagnetic wave concentrator, especially a solar energy concentrator, in the form of a thin plate made up of a succession of identical light coupling modules each made up of two identical prisms made of transparent materials and having different indexes of refraction. The physical characteristi ...


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Frederick Series, Isabelle Marc: Accuracy of breath-by-breath analysis of flow volume loop in identifying flow-limited breathing cycles in patients. Universite Laval, Merchant Gould Smith Edell Welter & Schmidt, October 10, 1995: US05456264 (39 worldwide citation)

Inspiratory flow limitation (IFL) is involved in the pathophysiology of sleep-related breathing disorders. Since the definition of flow-limited cycle is based on a dissociation between flow and respiratory efforts, identification of IFL requires upper airway or intrathoracic pressure measurements. W ...