Patent ID: 7292224

Claim:
A hand-held computer input and control device, comprising: a body configured to be held in the palm of a relaxed free floating hand, the body having a top portion that is generally hemispherical in shape, and a bottom portion; a plurality of manual controls disposed on the generally hemispherical top portion of the body for operation by a user's thumb and at least one of the user's 1 st and 2 nd fingers, and wherein the user's 3 rd and 4 th fingers are wrapped around the bottom portion of the device, and the 3 rd finger is positioned in a groove specifically located below the top portion to allow the user to securely retain the device without aid from the other fingers, thereby allowing complete, independent, and non-opposable freedom of movement of the thumb, 1 st , and 2 nd fingers, to actuate the controls; and wherein the bottom portion configured such that a groove for the 4 th finger is wrapped at a reduced radius relative to the 3 rd finger and whose horizontal cross-section is generally circular.