Inventor
NAGAI MASAO
US34 patents
⚠️ This page may combine multiple inventors who share the name “NAGAI MASAO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
MIZUNO KK
19 patentsUS5190289AMar 2, 1993
Golf club
MIZUNO KK228 citations99
US7126339B2Oct 24, 2006
Utility iron golf club with weighting element
MIZUNO KK66 citations97
US7022028B2Apr 4, 2006
Iron golf club and golf club set with variable weight distribution
MIZUNO KK90 citations97
US6855069B2Feb 15, 2005
Game improvement golf club using hollow technology
MIZUNO KK67 citations97
USD466961SDec 10, 2002
Back of a golf club head
MIZUNO KK72 citations96
USD428635SJul 25, 2000
Recessed back portion of a golf club head
MIZUNO KK106 citations96
USD428634SJul 25, 2000
Recessed back portion of a golf club head
MIZUNO KK116 citations96
USD461865SAug 20, 2002
Sole for a golf club wood
MIZUNO KK104 citations95
US6553572B2Apr 29, 2003
Removable insert for athletic leg guards
MIZUNO KK66 citations93
USD466576SDec 3, 2002
Rear inset of a golf club head
MIZUNO KK47 citations93
US6416422B1Jul 9, 2002
Golf club head with bounce channel
MIZUNO KK32 citations93
USD521095SMay 16, 2006
Back design for a golf club iron head
MIZUNO KK15 citations92
US6678899B2Jan 20, 2004
Chest protector
MIZUNO KK42 citations91
USD484648SDec 30, 2003
Chest protector
MIZUNO KK27 citations91
USD461936SAug 20, 2002
Athletic leg guard
MIZUNO KK23 citations91
USD449086SOct 9, 2001
Recessed back portion of a golf club head
MIZUNO KK22 citations89
US6826786B2Dec 7, 2004
Chest protector
MIZUNO KK14 citations83
US6793587B2Sep 21, 2004
Trial golf club, golf club fitting system and methods of using the same
MIZUNO KK17 citations82
USD529974SOct 10, 2006
Back design for a golf club iron head
MIZUNO KK2 citations62
MIZUNO USA
6 patentsUS8016694B2Sep 13, 2011
Golf club head and golf clubs
MIZUNO USA332 citations99
USD561284SFeb 5, 2008
Golf club wood head
MIZUNO USA115 citations98
USD550316SSep 4, 2007
Recessed back portion of a golf iron
MIZUNO USA41 citations92
USD549295SAug 21, 2007
Recessed back portion of a golf iron
MIZUNO USA28 citations92
USD550796SSep 11, 2007
Lower back portion of a golf iron
MIZUNO USA8 citations74
US7517286B2Apr 14, 2009
Trial golf club for measuring loft angle and methods for using the same
MIZUNO USA3 citations62