1
Stephen J Bisset, Bernard Kasser: Multiple fingers contact sensing method for emulating mouse buttons and mouse operations on a touch sensor pad. Logitech, Townsend and Townsend and Crew, October 20, 1998: US05825352 (1443 worldwide citation)

Method and apparatus for detecting an operative coupling between one or more fingers or other appropriate objects and a touch pad includes processes for detection of multiple maxima with intermediate minima in appropriate sequences to emulate the operations of cursor control and button actuations in ...


2
Bernard Kasser: Touch and pressure sensing method and apparatus. Logitech, Townsend and Townsend and Crew, December 14, 1999: US06002389 (375 worldwide citation)

The present invention provides a touch pad which can detect a simply stylus using a change capacitance. The touch pad is made flexible, so that the stylus pressure compresses an insulating layer between a conductive reference layer and matrix of conductive traces. The compression causes a change in ...


3
Stephen J Bisset, Bernard Kasser, Berni Joss, Aleksey Tareyev: Touch sensing method and apparatus. Logitech, Townsend and Townsend and Crew, July 6, 1999: US05920309 (315 worldwide citation)

Method and apparatus for sensing the simultaneous proximity of one or more fingers or other appropriate objects to a capacitive touch sensor. A modulator/demodulator pair drive and sense either a single trace or a pair of traces. In a dual trace embodiment, differentially sensed signals are then pea ...


4
Bernard Kasser, Bernhard Joss, Stephen J Bisset: Touch sensing method and apparatus. Logitech, Townsend and Townsend and Crew, August 4, 1998: US05790107 (220 worldwide citation)

Method and apparatus for determining small variations in capacitance, typically in a capacitive touch sensing device, includes a reference signal of a first frequency and a sample signal of a second frequency. The reference and sample signals are mixed and filtered to isolate the beat frequency ther ...


5
Vitali D Moissev, Vitali P Sumenkov, Andrev A Tareev, Aleksey A Tareev, Roland Singer: Touchpad with active plane for pen detection. Logitech, Townsend and Townsend and Crew, August 31, 1999: US05945980 (198 worldwide citation)

A touchpad which simulates an active stylus by providing pulses to the entire active plane (making it an active plane), instead of the stylus. This allows a simple, non-active stylus to compress the touchpad to bring the X, Y traces closer to the active plane at the point to be detected. The phase o ...


6
James Barnes, Ron Mc Clure, David Glickman: Computer input device with multiple switches using single line. Logitech, Townsend and Townsend and Crew, May 30, 2000: US06069594 (165 worldwide citation)

Apparatus and methods for providing positional and attitude information to a computer. An input device of the present invention comprises a controller, a transducer, and a mouse. In a 6D mode of operation, three-dimensional positional information with three degrees of freedom is provided to the comp ...


7
Jeffrey S Anderson, Daniel J DeFranco, Paul Loughnane, Frantz Lohier: Ease-of-use wireless speakers. Logitech Europe, Kilpatrick Townsend & Stockton, March 22, 2016: US09294840 (138 worldwide citation)

One embodiment of the invention is directed to a speaker system comprising a first speaker apparatus comprising a housing, speaker components positioned substantially inside the housing and at least one first speaker apparatus charging member, wherein the speaker components include a power source, a ...


8
Rene Dandliker, Marc Bidiville: Pointing device utilizing a photodetector array. Logitech, Fenwick & West, May 25, 1999: US05907152 (128 worldwide citation)

An optical detection system particularly suited to us as a pointing device uses a photodetector array capable of generating a quasi-sinusoidal signal in response to illumination with an image of appropriate size. The detection system can use either coherent or non-coherent light, and existing textur ...


9
Marc Bidiville, Eric Raeber, Javier Arreguit, Harthmuth Buczek, Floris A Van Shaik, Fran cedilla ois Bauduin, Denis O Keeffe: Pointing device utilizing a photodetector array and controlled by a human finger contacting a prism. Logitech, James E Eakin, November 26, 1996: US05578817 (123 worldwide citation)

A cursor control device for personal computers and workstations includes various embodiments, some of which include a patterned ball and some of which rely on other patterned surfaces, which recognizes changes in the position of the pattern relative to a sensor having an array of photosensitive elem ...


10
Christophe Juncker, Nanda Kutty: Multiplayer peer-to-peer connection across firewalls and network address translators using a single local port on the local host. Logitech Europe, Townsend and Townsend and Crew, June 2, 2009: US07543064 (119 worldwide citation)

Embodiments of the invention achieve a very high success rate in multilayer peer-to-peer connection across firewalls and network address translators (NATs) using a single port on the local host. In one embodiment, a system of providing peer-to-peer connection comprises a plurality of host devices di ...