Inventor
HELMSTETTER RICHARD C
US182 patents
Patents
50 patentsUS7387577B2Jun 17, 2008
Multiple material golf club head
CALLAWAY GOLF CO113 citations99
US7255654B2Aug 14, 2007
Multiple material golf club head
CALLAWAY GOLF CO131 citations99
US7252600B2Aug 7, 2007
Multiple material golf club head
CALLAWAY GOLF CO205 citations99
US6994637B2Feb 7, 2006
Multiple material golf club head
CALLAWAY GOLF CO114 citations99
US6926619B2Aug 9, 2005
Golf club head with customizable center of gravity
CALLAWAY GOLF CO187 citations99
US6905420B2Jun 14, 2005
Putter head
CALLAWAY GOLF CO128 citations99
US6881159B2Apr 19, 2005
Multiple material golf club head
CALLAWAY GOLF CO187 citations99
US6800040B2Oct 5, 2004
Golf club head
CALLAWAY GOLF CO106 citations99
US6793588B2Sep 21, 2004
Putter head
CALLAWAY GOLF CO129 citations99
US6758763B2Jul 6, 2004
Multiple material golf club head
CALLAWAY GOLF CO236 citations99
US6739983B2May 25, 2004
Golf club head with customizable center of gravity
CALLAWAY GOLF CO455 citations99
US6739982B2May 25, 2004
Multiple material golf club head
CALLAWAY GOLF CO261 citations99
US6679782B2Jan 20, 2004
Putter head
CALLAWAY GOLF CO118 citations99
USD485320SJan 13, 2004
Putter head
CALLAWAY GOLF CO193 citations99
US6669577B1Dec 30, 2003
Golf club head with a face insert
CALLAWAY GOLF CO198 citations99
US6612938B2Sep 2, 2003
Composite golf club head
CALLAWAY GOLF CO176 citations99
US6582323B2Jun 24, 2003
Multiple material golf club head
CALLAWAY GOLF CO368 citations99
US6575845B2Jun 10, 2003
Multiple material golf club head
CALLAWAY GOLF CO380 citations99
US6565452B2May 20, 2003
Multiple material golf club head with face insert
CALLAWAY GOLF CO381 citations99
US6558272B2May 6, 2003
Golf club striking plate with variable bulge and roll
CALLAWAY GOLF CO124 citations99
US6547676B2Apr 15, 2003
Golf club head that optimizes products of inertia
CALLAWAY GOLF CO155 citations99
US6506125B2Jan 14, 2003
Putter head
CALLAWAY GOLF CO203 citations99
US6491592B2Dec 10, 2002
Multiple material golf club head
CALLAWAY GOLF CO495 citations99
US6475102B2Nov 5, 2002
Golf club head
CALLAWAY GOLF CO175 citations99
US6471600B2Oct 29, 2002
Putter head
CALLAWAY GOLF CO276 citations99
US6440008B2Aug 27, 2002
Composite golf club head
CALLAWAY GOLF CO194 citations99
US6435982B1Aug 20, 2002
Golf club head with a face composed of a forged material
CALLAWAY GOLF CO161 citations99
US6435977B1Aug 20, 2002
Set of woods with face thickness variation based on loft angle
CALLAWAY GOLF CO152 citations99
US6434811B1Aug 20, 2002
Weighting system for a golf club head
CALLAWAY GOLF CO122 citations99
US6428426B1Aug 6, 2002
Golf club striking plate with variable bulge and roll
CALLAWAY GOLF CO144 citations99
US6425832B2Jul 30, 2002
Golf club head that optimizes products of inertia
CALLAWAY GOLF CO262 citations99
US6406381B2Jun 18, 2002
Composite golf club head and method of manufacturing
CALLAWAY GOLF CO161 citations99
US6406378B1Jun 18, 2002
Sound enhanced composite golf club head
CALLAWAY GOLF CO156 citations99
USD458656SJun 11, 2002
Putter head
CALLAWAY GOLF CO182 citations99
USD457586SMay 21, 2002
Putter head
CALLAWAY GOLF CO146 citations99
US6390933B1May 21, 2002
High cofficient of restitution golf club head
CALLAWAY GOLF CO478 citations99
US6381828B1May 7, 2002
Chemical etching of a striking plate for a golf club head
CALLAWAY GOLF CO228 citations99
US6364788B1Apr 2, 2002
Weighting system for a golf club head
CALLAWAY GOLF CO201 citations99
US6354962B1Mar 12, 2002
Golf club head with a face composed of a forged material
CALLAWAY GOLF CO557 citations99
US6248025B1Jun 19, 2001
Composite golf club head and method of manufacturing
CALLAWAY GOLF CO420 citations99
US6027416AFeb 22, 2000
Hollow, metallic golf club head with relieved sole and dendritic structure
CALLAWAY GOLF CO153 citations99
USD402343SDec 8, 1998
Golf putter head
CALLAWAY GOLF CO147 citations99
US5755624AMay 26, 1998
Selectively balanced golf club heads and method of head selection
CALLAWAY GOLF CO199 citations99
US5749795AMay 12, 1998
Iron golf club head with dual intersecting recesses
CALLAWAY GOLF CO259 citations99
US5626530AMay 6, 1997
Golf club head with sole bevel indicia
CALLAWAY GOLF CO211 citations99
US5588923ADec 31, 1996
Golf club head with attached selected swing weight composite
CALLAWAY GOLF CO147 citations99
US5474296ADec 12, 1995
Metal wood golf club with variable faceplate thickness
CALLAWAY GOLF CO232 citations99
US5472203ADec 5, 1995
Iron golf club head with dual intersecting recesses
CALLAWAY GOLF CO205 citations99
US5464218ANov 7, 1995
Golf putter head with undercut back cavity and peripheral weighting
CALLAWAY GOLF CO150 citations99
US5437456AAug 1, 1995
Iron golf club head with dual intersecting recesses and associated slits
CALLAWAY GOLF CO150 citations99
Showing the top 50 of 182 patents by PatentIndex Score.