A solid golf ball having a plurality of dimples formed in its surface is characterized in that at least 70% of the entire dimples have a point of inflection at a position of 75 to 90% of their depth, and the overall dimple volume proportion is 0.7 to 0.9%....http://www.google.de/patents/US6558274?utm_source=gb-gplus-sharePatent US6558274 - Solid golf ball
