Patent ID: 8314772

Claim:
A computer mouse comprising: a. a first subassembly having a concavity; b. a second subassembly that includes a convexity having a toroidal surface that projects into the concavity of the first subassembly; c. a plurality of bearing elements, each bearing element interposed at least partially between the first and second subassemblies such that one of the subassemblies is supported by the other subassembly and such that relative movement is permitted between the subassemblies; d. a motion detection system for detecting motion of one of the first and second subassemblies relative to the other and for generating movement signals; e. one or more actuators for being contacted by one or more hand digits and for transforming digit motions and a circuit for generating command signals from the motions; f. a circuit for transmitting movement signals and command signals, and; g. wherein each subassembly includes one or more of: i. a base for being supported by a work surface, ii. a controller for being engaged with a hand; iii. a portion of the motion detection system, and iv. one or more of the actuators.