US Patent 8647216 Golf club head

Disclosed herein are various embodiments of a golf club head having improved mass distribution characteristics. The golf club head includes a body and a face positioned at a forward portion of the body. The golf club head also includes one or more mass elements positioned at predetermined locations about the head. The mass elements assist in achieving desired relationship between the moment of inertia about a center of gravity x-axis and the moment of inertia about a center of gravity z-axis.