Inventor · disambiguated record
David Llewellyn
Also filed as: LLEWELLYN DAVID · LLEWELLYN DAVID G · LLEWELLYN DAVID GREGORY
68 granted patents·6 pending applications·2,875 citations·filing 1999–2024
99Inventor score
Technology areasA63B
Top patents by PatentIndex Score
74 records- 0198US8016694B2Golf club head and golf clubsMIZUNO USA·Filed 2009·Granted Sep 13, 2011·332 cites·20 claims
- 0298US7611424B2Golf club head and golf clubMIZUNO USA INC·Filed 2007·Granted Nov 3, 2009·661 cites·20 claims
- 0397USD561284SGolf club wood headMIZUNO USA·Filed 2006·Granted Feb 5, 2008·115 cites·1 claims
- 0496USD428635SRecessed back portion of a golf club headMIZUNO KK·Filed 1999·Granted Jul 25, 2000·106 cites·1 claims
- 0596USD428634SRecessed back portion of a golf club headMIZUNO KK·Filed 1999·Granted Jul 25, 2000·116 cites·1 claims
- 0695USD579507SCrown for a hybrid golf clubMIZUNO USA·Filed 2007·Granted Oct 28, 2008·133 cites·1 claims
- 0795USD466961SBack of a golf club headMIZUNO KK·Filed 2001·Granted Dec 10, 2002·72 cites·1 claims
- 0895USD461865SSole for a golf club woodMIZUNO KK·Filed 2001·Granted Aug 20, 2002·104 cites·1 claims
- 0994US11794082B1Golf club head with sole side featuresMIZUNO KK·Filed 2022·Granted Oct 24, 2023·4 cites·20 claims
- 1094US9597563B2Multi-track adjustable golf clubMIZUNO USA INC·Filed 2014·Granted Mar 21, 2017·51 cites·13 claims
- 1194USD564611SGolf club wood headMIZUNO USA·Filed 2006·Granted Mar 18, 2008·90 cites·1 claims
- 1293US7022028B2Iron golf club and golf club set with variable weight distributionMIZUNO KK·Filed 2004·Granted Apr 4, 2006·90 cites·34 claims
- 1392USD669546SWood-type golf clubLLEWELLYN DAVID·Filed 2011·Granted Oct 23, 2012·64 cites·1 claims
- 1491US6855069B2Game improvement golf club using hollow technologyMIZUNO KK·Filed 2002·Granted Feb 15, 2005·67 cites·2 claims
- 1591USD466576SRear inset of a golf club headMIZUNO KK·Filed 2001·Granted Dec 3, 2002·47 cites·1 claims
- 1690US7126339B2Utility iron golf club with weighting elementMIZUNO KK·Filed 2002·Granted Oct 24, 2006·66 cites·1 claims
- 1789USD550316SRecessed back portion of a golf ironMIZUNO USA·Filed 2006·Granted Sep 4, 2007·41 cites·1 claims
- 1888US10159880B1Adjustable metal wood golf club head with moveable weight structureMIZUNO KK·Filed 2017·Granted Dec 25, 2018·13 cites·8 claims
- 1987USD617403SDriver-type golf club headMIZUNO USA INC·Filed 2009·Granted Jun 8, 2010·38 cites·1 claims
- 2087USD446567SSole portion for a golf club headMIZUNO USA INC·Filed 2001·Granted Aug 14, 2001·36 cites·1 claims
- 2186USD603923SBack design for an iron golf club headMIZUNO USA INC·Filed 2008·Granted Nov 10, 2009·21 cites·1 claims
- 2285US10245488B1Vibration damping bat and methods of making the sameMIZUNO KK·Filed 2017·Granted Apr 2, 2019·11 cites·20 claims
- 2385USD617858SDriver-type golf club headMIZUNO USA INC·Filed 2009·Granted Jun 15, 2010·34 cites·1 claims
- 2483USD600765SBack design for an iron golf club headMIZUNO USA INC·Filed 2008·Granted Sep 22, 2009·16 cites·1 claims
- 2582USD619184SBack design for iron golf club headsMIZUNO USA INC·Filed 2009·Granted Jul 6, 2010·28 cites·1 claims
- 2682USD619183SBack design for iron golf club headsMIZUNO USA INC·Filed 2009·Granted Jul 6, 2010·28 cites·1 claims
- 2782USD549295SRecessed back portion of a golf ironMIZUNO USA·Filed 2006·Granted Aug 21, 2007·28 cites·1 claims
- 2881USD720026SIron-type golf club headMIZUNO USA INC·Filed 2013·Granted Dec 23, 2014·26 cites·1 claims
- 2981USD659780SIron-type golf clubLLEWELLYN DAVID·Filed 2011·Granted May 15, 2012·28 cites·1 claims
- 3080US6416422B1Golf club head with bounce channelMIZUNO KK·Filed 2001·Granted Jul 9, 2002·32 cites·11 claims
- 3179USD645103SIron-type golf clubMIZUNO USA·Filed 2010·Granted Sep 13, 2011·26 cites·1 claims
- 3278US7758440B2Wood-type golf club heads and methods of adjusting the sameMIZUNO USA INC·Filed 2008·Granted Jul 20, 2010·18 cites·12 claims
- 3377USD682962SIron-type golf club headLLEWELLYN DAVID·Filed 2012·Granted May 21, 2013·22 cites·1 claims
- 3477US8021246B2Iron golf club heads and golf club sets with variable weight distributionMIZUNO USA INC·Filed 2009·Granted Sep 20, 2011·11 cites·6 claims
- 3575USD736875SIron-type golf club headMIZUNO USA INC·Filed 2014·Granted Aug 18, 2015·19 cites·1 claims
- 3673USD449086SRecessed back portion of a golf club headMIZUNO KK·Filed 2000·Granted Oct 9, 2001·22 cites·1 claims
- 3771US7972222B2Iron golf club heads and golf club sets with variable weight distributionMIZUNO USA INC·Filed 2009·Granted Jul 5, 2011·7 cites·24 claims
- 3870USD521095SBack design for a golf club iron headMIZUNO KK·Filed 2005·Granted May 16, 2006·15 cites·1 claims
- 3969USD660390SIron-type golf clubLLEWELLYN DAVID·Filed 2011·Granted May 22, 2012·16 cites·1 claims
- 4069USD639363SWood-type golf clubMIZUNO USA·Filed 2010·Granted Jun 7, 2011·17 cites·1 claims
- 4169US6793587B2Trial golf club, golf club fitting system and methods of using the sameMIZUNO KK·Filed 2002·Granted Sep 21, 2004·17 cites·16 claims
- 4269US2024050819A1Golf club head with sole side featuresMIZUNO KK·Filed 2023·Application pending·0 cites
- 4368US9333399B2Adjustable golf clubMIZUNO USA INC·Filed 2013·Granted May 10, 2016·4 cites·20 claims
- 4467USD629061SIron-type golf clubMIZUNO USA INC·Filed 2010·Granted Dec 14, 2010·15 cites·1 claims
- 4565USD650876SHybrid-type golf club headLLEWELLYN DAVID·Filed 2011·Granted Dec 20, 2011·13 cites·1 claims
- 4665US6843733B1Cavity back golf club having a multi-tiered weight distribution configurationMIZUNO KK·Filed 2003·Granted Jan 18, 2005·12 cites·18 claims
- 4764USD682961SIron-type golf club headLLEWELLYN DAVID·Filed 2012·Granted May 21, 2013·13 cites·1 claims
- 4864USD641817SWood-type golf club headMIZUNO USA·Filed 2010·Granted Jul 19, 2011·14 cites·1 claims
- 4962USD736872SIron-type golf club headMIZUNO USA INC·Filed 2014·Granted Aug 18, 2015·11 cites·1 claims
- 5062US7517286B2Trial golf club for measuring loft angle and methods for using the sameMIZUNO USA·Filed 2006·Granted Apr 14, 2009·3 cites·11 claims
Showing the top 50 of 74 patent records by PatentIndex Score.
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