1
Taizo Yasutake: Graphical input controller and method with rear screen image detection. ITU Research, Fenwick & West, January 9, 1996: US05483261 (1107 worldwide citation)

An interactive graphics system includes a touch-sensitive controller having a number of semi-transparent light-diffusing panels imaged by a rear mounted imaging device such as a video camera. The imaging device is arranged to detect the shadows of objects, such as fingers, touching any of the panels ...


2
Taizo Yasutake: Methods and apparatus for providing touch-sensitive input in multiple degrees of freedom. ITU Research, Perkins Coie, July 22, 2003: US06597347 (245 worldwide citation)

Disclosed is a multiple coordinate controller device having a three-dimensional body with a first surface portion and a second surface portion where the second surface portion is not coplanar with the first surface. A first transducer with a first sensing surface is coupled to the first surface port ...


3
Taizo Yasutake: Touch sensitive input control device. ITU Research, Hickman Beyer & Weaver, March 17, 1998: US05729249 (160 worldwide citation)

A family of controllers incorporate multiple force/touch sensitive input elements to provide intuitive input in up to six degrees of freedom, including position and rotation, in either a Cartesian, cylindrical or spherical coordinate system. Six dimensions of input can be generated without requiring ...


4
Taizo Yasutake: Touch sensitive input control device. ITU Research, Hickman & Martine, September 8, 1998: US05805137 (91 worldwide citation)

A family of controllers incorporate multiple force/touch sensitive input elements to provide intuitive input in up to six degrees of freedom, including position and rotation, in either a Cartesian, cylindrical or spherical coordinate system. Six dimensions of input can be generated without requiring ...