Patent ID: 8622852

Claim:
A golf ball having a plurality of dimples formed on its outer surface, the outer surface of the golf ball being divided into plural areas, a first group of areas containing a plurality of first dimples and no second dimples, a second group of areas containing a plurality of second dimples and no first dimples, each area of the second group abutting one or more areas of the first group, the first and second groups of areas and dimple shapes and dimensions being configured such that the golf ball is spherically symmetrical as defined by the United States Golf Association (USGA) Symmetry Rules and such that the first and second groups of areas produced different aerodynamic effects, and the first dimples are all of smaller diameter than the second dimples, wherein the unit volume in each area of one of the groups is greater than the unit volume in each area of the other group, and wherein unit volume is defined as the volume of the dimples in the area divided by the surface area in that area, wherein some of the dimples are spherical and some are truncated.