Patent Document ID: 20170087433
Application ID: 15373827
Patent Flag: 0

Claim One:
1. A method of tracking the rotation axis of a thrown athletic ball as the athletic ball travels through space, comprising: providing an athletic ball having a rotation axis indicator extending out from the surface of the athletic ball in a fixed orientation relative to the surface of the athletic ball, the rotation axis indicator being defined by a longitudinal axis axially aligned with the rotation axis of the athletic ball; when gripping the athletic ball with a throwing hand (1) locating the rotation axis indicator in relation to the palm of the throwing hand according to a desired rotation of the athletic ball to be achieved when thrown and (2) placing the fingertips of the throwing hand about the surface of the athletic ball according to said desired rotation, wherein the location of the fingertips in relation to the location of the rotation axis indicator is determined according to said desired rotation; and once the athletic ball is thrown, observing the rotation axis indicator as the athletic ball travels through space.