Patent ID: 7416128

Claim:
A method for determining the position of a hand-held object from the acceleration of said hand-held object, said method comprising: generating a measure of the displacement of said hand-held object, wherein said measure of said displacement of said hand-held object is derived in part from a measure of an acceleration of said hand-held object; generating a measure of a position of said hand-held object, wherein said generating said measure of said position of said hand-held object is based in part on said displacement of said hand-held object; outputting said measure of said position of said hand-held object, wherein said measure of said position is supplied to a hand-held object responsive application program, wherein no more than three accelerometers enable said generating of said measure of said position that enables a three dimensional on screen indicator; and comparing said measure of said acceleration with a second measure of second acceleration that was previously produced to enable authenticating a second signature against a first signature, wherein said first signature was created using said acceleration and said second signature was created using said second acceleration.