A putter head includes: a face; a first group of grooves which are mutually-parallel grooves; and a second group of grooves which differ in depth from the first group of grooves, wherein the face includes the first group of grooves and the second group of grooves.
申请公布号
AU2007234473(A1)
申请公布日期
2008.06.12
申请号
AU20070234473
申请日期
2007.11.14
申请人
BRIDGESTONE SPORTS CO., LTD.
发明人
SATO FUMIAKI;TATENO ATSUO;BAN WATARU;ISHIKAWA TATSUYA
