06597347 is referenced by 245 patents and cites 10 patents.

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 portion of the body and capable of detecting both positions and a range of pressure forces at positions on the first sensing surface. The first transducer is further capable of providing a first range of z coordinates at a detected x,y coordinate in response to the range of pressure forces on said first sensing surface. A second transducer having a second sensing surface is coupled to the second surface portion of the body and capable of detecting both positions and a range of pressure forces at the positions on the second sensing surface. The second transducer is further capable of providing a second range of z coordinates of opposite polarity to the first range of z coordinates in response to the range of forces on second sensing surface.

Title
Methods and apparatus for providing touch-sensitive input in multiple degrees of freedom
Application Number
9/216663
Publication Number
6597347 (B1)
Application Date
December 16, 1998
Publication Date
July 22, 2003
Inventor
Taizo Yasutake
Cupertino
CA, US
Agent
Perkins Coie
US
Assignee
ITU Research
CA, US
IPC
G08C 21/00
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