Patent ID: 7361100

Claim:
A golf club head comprising: a body formed of a metallic material, said body having an inside surface, an outside surface, a heel end, a toe end, a front wall and a rear body portion, said front wall including a face adapted for impacting a golf ball, said rear body portion including a crown, a sole, and a perimeter region extending continuously from said toe end to said heel end, said body further comprising a solid rear extension comprising a solid wall extending at least 20 millimeters rearward from a crown region of said front wall and first and second openings formed in the crown, said first and second openings each being in the form of an annular sector rearward of said solid rear extension; a nonmetallic material extending across and closing said first and second openings; said first and second openings are concave toward the front wall of said body and convex toward the rear body portion of said body; said body comprising a third opening formed in the crown; said third opening having the form of an annular sector that is concave toward the front wall of said body and convex toward the rear body portion of said body; said nonmetallic material extending across and closing said third opening; said body comprising a fourth opening formed in the crown; said fourth opening being substantially semi-circular in shape; and said nonmetallic material extending across and closing said fourth opening.