Patent 7780547 was granted and assigned to Bridgestone on August, 2010 by the United States Patent and Trademark Office.
A golf club head of a hollow wood type, that includes: a face portion; a body portion including a crown portion; and a film provided on the face portion and at least a front part of the crown portion. A film thickness T1 of the face portion is greater than or equal to a film thickness T2 of the body portion.