US Patent 9220961 Golf tee

A golf tee is provided, including a head portion, a neck portion, a stem portion, and a tip portion. The head portion is provided on a top of the golf tee and having a right-left symmetry. The neck portion is extended from the head portion and having a the right-left symmetry. The stem portion is extended from the neck portion and having a broken right-left symmetry. The tip portion is extended from the stem portion and configured for being pushed into a ground. The stem portion provides top-down and right-left aerodynamic unbalances to the golf tee, such that the golf tee rotates about a middle portion much more rather than flies away when the golf tee receives an external impact.