US Patent 7651413 Golf club head of heterogeneous metals

The present invention provides a golf club head of heterogeneous metals, which includes a main body having a front side forming a fitting cavity to which a striking face plate made of a metal having a specific weight less than nine is fit and a bottom side which is enclosed by a sole member made of a metal having a specific weight great than twelve to thereby lower the gravity center of the club head to ensure stability of ball striking and also reduce the area on which welding operation is carried out so as to effectively reduce the manufacturing costs.