Patent 6974394 was granted and assigned to Callaway Golf Company on December, 2005 by the United States Patent and Trademark Office.
A putter-type club head (20) has a body (22) that is preferably composed of a material having a density ranging from ranging from 2.0 g/cm3 to 3.0 g/cm3. The body (22) has a plurality of mass ports (50, 52 and 54) and a plurality of mass members (56, 58, and 60), each of which is located in a respective mass port. The body (22) further includes a heel aperture (34) and a toe aperture (36).