Patent ID: 8690709

Claim:
A golf club, comprising: a club shaft; a club head configured at one end of the club shaft and having a striking face, the club head including: a first head portion formed of a first material; and a second head portion, formed separately from the first head portion and stacked vertically on top of the first head portion, wherein the second head portion is connected to the first head portion at a top surface of the first head portion and forms a top portion of the club head, the second head portion is formed of a second material, the second head portion is exposed to a front and a rear of the club head, and the second material is less dense than the first material; wherein the top surface of the first head portion extends along a horizontal tangent to a notch radius of the club and a lowermost surface of the second head portion extends along the horizontal tangent to the notch radius of the club; and wherein the second head portion is 30-45 percent of the mass of the club head.