Patent 10155138 was granted and assigned to Sumitomo Rubber Industries on December, 2018 by the United States Patent and Trademark Office.
The golf club head includes a crown portion, a face portion and a sole portion. The crown portion is formed to have an average thickness, in a range of a predetermined length toward a back side from a boundary between the crown portion and the face portion, that is larger in a vicinity of a center in a toe-heel direction than at a toe side and a heel side.