A multi-piece golf ball has a core (3), an interlayer (5), and a cover (7), the core (3) being provided with a spherical main part (31) and a plurality of ribs (32) formed on the main part (31), the interlayer (5) being accommodated in depressions (33) surrounded by the ribs (32) and having a thickness...http://www.google.fr/patents/US7326130?utm_source=gb-gplus-shareBrevet US7326130 - Multi-piece golf ball and manufacturing method thereof
Multi-piece golf ball and manufacturing method thereof
