Inventor · disambiguated record
Masao Nagai
Also filed as: NAGAI MASAO
34 granted patents·4 pending applications·2,473 citations·filing 1986–2017
98Inventor score
Top patents by PatentIndex Score
38 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
- 0696US5190289AGolf clubMIZUNO KK·Filed 1991·Granted Mar 2, 1993·228 cites·13 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
- 0993US7022028B2Iron golf club and golf club set with variable weight distributionMIZUNO KK·Filed 2004·Granted Apr 4, 2006·90 cites·34 claims
- 1091US6855069B2Game improvement golf club using hollow technologyMIZUNO KK·Filed 2002·Granted Feb 15, 2005·67 cites·2 claims
- 1191USD466576SRear inset of a golf club headMIZUNO KK·Filed 2001·Granted Dec 3, 2002·47 cites·1 claims
- 1290US10048699B2Vehicle control apparatusTOYOTA MOTOR CO LTD·Filed 2016·Granted Aug 14, 2018·10 cites·5 claims
- 1390US7126339B2Utility iron golf club with weighting elementMIZUNO KK·Filed 2002·Granted Oct 24, 2006·66 cites·1 claims
- 1490US6553572B2Removable insert for athletic leg guardsMIZUNO KK·Filed 2001·Granted Apr 29, 2003·66 cites·7 claims
- 1589USD550316SRecessed back portion of a golf ironMIZUNO USA·Filed 2006·Granted Sep 4, 2007·41 cites·1 claims
- 1687USD446567SSole portion for a golf club headMIZUNO USA INC·Filed 2001·Granted Aug 14, 2001·36 cites·1 claims
- 1786US6678899B2Chest protectorMIZUNO KK·Filed 2001·Granted Jan 20, 2004·42 cites·13 claims
- 1882USD549295SRecessed back portion of a golf ironMIZUNO USA·Filed 2006·Granted Aug 21, 2007·28 cites·1 claims
- 1980US10807573B2Driving assistance control apparatus of vehicleTOYOTA MOTOR CO LTD·Filed 2017·Granted Oct 20, 2020·2 cites·9 claims
- 2080US9239380B2Driver assistance system for avoiding collisions of a vehicle with pedestriansHEGEMANN STEFAN·Filed 2009·Granted Jan 19, 2016·29 cites·14 claims
- 2180USD484648SChest protectorMIZUNO KK·Filed 2001·Granted Dec 30, 2003·27 cites·1 claims
- 2280US6416422B1Golf club head with bounce channelMIZUNO KK·Filed 2001·Granted Jul 9, 2002·32 cites·11 claims
- 2378US5204584ALow pressure mercury vapor discharge lampTOSHIBA LIGHTING & TECHNOLOGY·Filed 1991·Granted Apr 20, 1993·31 cites·17 claims
- 2477USD461936SAthletic leg guardMIZUNO KK·Filed 2001·Granted Aug 20, 2002·23 cites·1 claims
- 2573USD449086SRecessed back portion of a golf club headMIZUNO KK·Filed 2000·Granted Oct 9, 2001·22 cites·1 claims
- 2670USD521095SBack design for a golf club iron headMIZUNO KK·Filed 2005·Granted May 16, 2006·15 cites·1 claims
- 2769US6793587B2Trial golf club, golf club fitting system and methods of using the sameMIZUNO KK·Filed 2002·Granted Sep 21, 2004·17 cites·16 claims
- 2865US7668635B2Front wheel steering control deviceUNIV TOKYO NAT UNIV CORP·Filed 2005·Granted Feb 23, 2010·7 cites·2 claims
- 2965US6826786B2Chest protectorMIZUNO KK·Filed 2004·Granted Dec 7, 2004·14 cites·13 claims
- 3062US7517286B2Trial golf club for measuring loft angle and methods for using the sameMIZUNO USA·Filed 2006·Granted Apr 14, 2009·3 cites·11 claims
- 3151USD550796SLower back portion of a golf ironMIZUNO USA·Filed 2006·Granted Sep 11, 2007·8 cites·1 claims
- 3250US8090492B2Vehicle motion measurement apparatus, a vehicle abnormal motion prevention apparatus and a drive recorderNAGAI MASAO·Filed 2007·Granted Jan 3, 2012·2 cites·5 claims
- 3349US2007039628A1Cigarette making apparatusJAPAN TOBACCO INC·Filed 2006·Application pending·0 cites
- 3443US4759630ALamp quality judgement apparatus and judgement method thereforTOSHIBA KK·Filed 1986·Granted Jul 26, 1988·12 cites·17 claims
- 3540US2017327110A1Driving assistance control device for vehicleTOYOTA MOTOR CO LTD·Filed 2017·Application pending·0 cites
- 3636USD529974SBack design for a golf club iron headMIZUNO KK·Filed 2005·Granted Oct 10, 2006·2 cites·1 claims
- 3735US2015336587A1Driving assist deviceTOYOTA MOTOR CO LTD·Filed 2015·Application pending·0 cites
- 3826US2004255661A1Tire testing machine for real time evaluation of steering stabilityFiled 2002·Application pending·0 cites
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