Patent 7156750 was granted and assigned to Bridgestone on January, 2007 by the United States Patent and Trademark Office.
A golf club head includes a front body, a middle body, a back body integrally. The middle body is disposed between the front body and the back body. The middle body includes a middle crown constituting a middle portion of a crown portion in back and forth directions, a middle side constituting middle portions of both side surfaces on a toe side and a heel side in the back and forth directions, a middle sole constituting a middle portion of a sole portion in the back and forth directions. The middle body may include aluminum alloy. The front body and the back body may include titanium alloy.