Inventor · disambiguated record
Masazumi Kobayashi
Also filed as: KOBAYASHI MASAZUMI
39 granted patents·6 pending applications·170 citations·filing 1997–2023
97Inventor score
Files withNTN TOYO BEARING CO LTD32KOBAYASHI MASAZUMI7YAMAZAKI KISAO2KOBAYASHI PREC INDUSTRY CO LTD1NAKAGAWA NAOKI1
Top patents by PatentIndex Score
45 records- 0185US11835096B2Plunging type constant velocity universal joint for propeller shaftNTN TOYO BEARING CO LTD·Filed 2019·Granted Dec 5, 2023·2 cites·16 claims
- 0284US6913540B2Constant velocity universal joint for propeller shaftNTN TOYO BEARING CO LTD·Filed 2002·Granted Jul 5, 2005·23 cites·15 claims
- 0383US7097567B2Constant velocity universal jointNTN TOYO BEARING CO LTD·Filed 2005·Granted Aug 29, 2006·7 cites·7 claims
- 0481US11359676B2Fixed-type constant velocity universal jointNTN TOYO BEARING CO LTD·Filed 2018·Granted Jun 14, 2022·2 cites·1 claims
- 0581US11353066B2Fixed type constant velocity universal joint for rear-wheel drive shaftNTN TOYO BEARING CO LTD·Filed 2018·Granted Jun 7, 2022·2 cites·8 claims
- 0681US6910970B2Constant velocity universal jointNTN TOYO BEARING CO LTD·Filed 2002·Granted Jun 28, 2005·16 cites·6 claims
- 0781US6506122B2Constant velocity universal jointNTN TOYO BEARING CO LTD·Filed 2001·Granted Jan 14, 2003·16 cites·18 claims
- 0880US10539193B2Method for manufacturing outer joint member for constant-velocity universal joint and outer joint memberNTN TOYO BEARING CO LTD·Filed 2015·Granted Jan 21, 2020·2 cites·4 claims
- 0980US7431653B2Sliding type constant velocity universal jointNTN TOYO BEARING CO LTD·Filed 2005·Granted Oct 7, 2008·6 cites·3 claims
- 1079US11326649B2Rear-wheel drive shaftNTN TOYO BEARING CO LTD·Filed 2018·Granted May 10, 2022·2 cites·3 claims
- 1179US7704150B2Sliding type constant velocity universal jointNTN TOYO BEARING CO LTD·Filed 2008·Granted Apr 27, 2010·5 cites·5 claims
- 1278US8066575B2Constant velocity universal joint and inner member of the sameKOBAYASHI MASAZUMI·Filed 2006·Granted Nov 29, 2011·6 cites·12 claims
- 1377US10221895B2Method for manufacturing outer joint member for constant-velocity universal joint and outer joint memberNTN TOYO BEARING CO LTD·Filed 2015·Granted Mar 5, 2019·2 cites·5 claims
- 1476US10933462B2Method for forging shaft member of constant velocity universal jointNTN TOYO BEARING CO LTD·Filed 2016·Granted Mar 2, 2021·2 cites·13 claims
- 1576US6506121B2Cage for constant-velocity joint and method for manufacturing the sameNTN TOYO BEARING CO LTD·Filed 2000·Granted Jan 14, 2003·14 cites·15 claims
- 1675US8499457B2Fixed constant velocity universal joint, method of manufacturing fixed constant velocity universal joint, and bearing device adapted for use in driving wheel and using fixed constant velocity universal jointKOBAYASHI MASAZUMI·Filed 2009·Granted Aug 6, 2013·5 cites·1 claims
- 1773US11359677B2Plunging type constant velocity universal joint for rear-wheel drive shaftNTN TOYO BEARING CO LTD·Filed 2018·Granted Jun 14, 2022·3 cites·5 claims
- 1873US5853328APower transmission device and constant velocity universal joint thereforNTN TOYO BEARING CO LTD·Filed 1997·Granted Dec 29, 1998·25 cites·31 claims
- 1972US8388456B2Fixed-type, constant-velocity universal jointYAMAZAKI KISAO·Filed 2009·Granted Mar 5, 2013·4 cites·20 claims
- 2071US8469829B2Fixed constant velocity universal jointKOBAYASHI MASAZUMI·Filed 2008·Granted Jun 25, 2013·4 cites·8 claims
- 2171US7413515B2Drive shaft for ATVsNTN TOYO BEARING CO LTD·Filed 2005·Granted Aug 19, 2008·4 cites·5 claims
- 2267US8403764B2Constant velocity universal jointKOBAYASHI MASAZUMI·Filed 2008·Granted Mar 26, 2013·3 cites·11 claims
- 2363US12203510B2Plunging type constant velocity universal joint for propeller shaftNTN TOYO BEARING CO LTD·Filed 2023·Granted Jan 21, 2025·0 cites·5 claims
- 2462US8342971B2Fixed type constant velocity universal jointNTN TOYO BEARING CO LTD·Filed 2008·Granted Jan 1, 2013·2 cites·6 claims
- 2561US7258616B2Fixed type constant velocity universal jointNTN TOYO BEARING CO LTD·Filed 2004·Granted Aug 21, 2007·6 cites·6 claims
- 2658US8529360B2Outer joint member for fixed constant velocity universal jointKOBAYASHI MASAZUMI·Filed 2009·Granted Sep 10, 2013·1 cites·12 claims
- 2756US9605715B2Method of manufacturing outer joint member of constant velocity universal joint, and outer joint memberOSUGI MASAFUMI·Filed 2014·Granted Mar 28, 2017·1 cites·6 claims
- 2852US12429095B2Plunging-type constant velocity universal jointNTN TOYO BEARING CO LTD·Filed 2023·Granted Sep 30, 2025·0 cites·5 claims
- 2950US12359695B2Fixed-type constant velocity universal jointNTN TOYO BEARING CO LTD·Filed 2020·Granted Jul 15, 2025·0 cites·8 claims
- 3050US8182352B2Constant velocity universal jointKOBAYASHI MASAZUMI·Filed 2008·Granted May 22, 2012·3 cites·2 claims
- 3147US2024426348A1Plunging type constant velocity universal jointNTN TOYO BEARING CO LTD·Filed 2022·Application pending·0 cites
- 3247US2024426349A1Plunging type constant velocity universal jointNTN TOYO BEARING CO LTD·Filed 2022·Application pending·0 cites
- 3346US2010234115A1Constant velocity universal jointNTN TOYO BEARING CO LTD·Filed 2007·Application pending·0 cites
- 3445US8079913B2Slide-type constant velocity universal jointKOBAYASHI MASAZUMI·Filed 2006·Granted Dec 20, 2011·0 cites·2 claims
- 3543US10478914B2Method for butt welding, butt welded joint, and outside joint member for constant velocity universal jointNAKAGAWA NAOKI·Filed 2015·Granted Nov 19, 2019·0 cites·12 claims
- 3640US10352369B2Constant velocity universal joint outer joint member and manufacturing method for sameNTN TOYO BEARING CO LTD·Filed 2015·Granted Jul 16, 2019·0 cites·12 claims
- 3740US2018036049A1Bone plate and bone plate systemKOBAYASHI PREC INDUSTRY CO LTD·Filed 2016·Application pending·0 cites
- 3839US2003017877A1Constant velocity universal jointFiled 2002·Application pending·0 cites
- 3938US10107338B2Method for manufacturing outer joint member for constant velocity universal joint and outer joint memberNTN TOYO BEARING CO LTD·Filed 2015·Granted Oct 23, 2018·0 cites·9 claims
- 4037US10761065B2Device for inspecting junction-type outer joint member of constant velocity universal jointNTN TOYO BEARING CO LTD·Filed 2015·Granted Sep 1, 2020·0 cites·4 claims
- 4137US2012172137A1Power-transmission shaft and assemblyYAMAZAKI KISAO·Filed 2010·Application pending·0 cites
- 4236US7147565B2Fixed type constant velocity jointNTN TOYO BEARING CO LTD·Filed 2004·Granted Dec 12, 2006·2 cites·4 claims
- 4334US10514070B2Method for manufacturing outer joint member for constant velocity universal joint, shaft member and outer joint memberNTN TOYO BEARING CO LTD·Filed 2015·Granted Dec 24, 2019·0 cites·6 claims
- 4433US10280984B2Constant velocity universal joint outer joint member and manufacturing method for sameNTN TOYO BEARING CO LTD·Filed 2015·Granted May 7, 2019·0 cites·18 claims
- 4530US7785206B2Fixed constant velocity universal jointNTN TOYO BEARING CO LTD·Filed 2006·Granted Aug 31, 2010·0 cites·4 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →