Golf ball 2 has a northern hemisphere N above the equatorial line 16, and a southern hemisphere S below the equatorial line 16. Each of the northern hemisphere N and the southern hemisphere S has a pole vicinity region 18, an equator vicinity region 20 and a coordination region 22. The pole vicinity...http://www.google.co.uk/patents/US7331879?utm_source=gb-gplus-sharePatent US7331879 - Golf ball
