Patent 7316623 was granted and assigned to Bridgestone on January, 2008 by the United States Patent and Trademark Office.
A golf club head has a head main body, an elastic body, and a lid body. The head main body has a back surface and a sole surface, and defines a recess portion depressed from one of the back surface and the sole surface. The elastic body is fixed in the recess portion in an compressed state and defines an empty portion. The lid body is attached to an entrance portion of the recess portion.