Inventor · disambiguated record
Ryouhei Hayama
Also filed as: HAYAMA RYOUHEI
32 granted patents·1 pending application·616 citations·filing 2000–2016
97Inventor score
Top patents by PatentIndex Score
33 records- 0198US6415215B1Vehicle attitude control apparatusKOYO SEIKO CO·Filed 2001·Granted Jul 2, 2002·181 cites·19 claims
- 0295US6698542B2Steering device for vehicleKOYO SEIKO LTD·Filed 2002·Granted Mar 2, 2004·63 cites·3 claims
- 0393US6442462B1Motor vehicle steering systemKOYO SEIKO CO·Filed 2001·Granted Aug 27, 2002·64 cites·5 claims
- 0489US6896090B2Vehicle steering deviceKOYO SEIKO CO·Filed 2003·Granted May 24, 2005·43 cites·20 claims
- 0587US7862084B2Vehicle steering apparatusJTEKT CORP·Filed 2008·Granted Jan 4, 2011·24 cites·10 claims
- 0682US9442043B2Vehicle test apparatus and vehicle test systemJTEKT CORP·Filed 2014·Granted Sep 13, 2016·6 cites·6 claims
- 0779US9108667B2Motor vehicle steering systemHAYAMA RYOUHEI·Filed 2011·Granted Aug 18, 2015·7 cites·15 claims
- 0878US8855859B2Vehicle steering system and material handling vehicleJTEKT CORP·Filed 2012·Granted Oct 7, 2014·8 cites·6 claims
- 0978US7806224B2Vehicle steering apparatusJTEKT CORP·Filed 2008·Granted Oct 5, 2010·13 cites·5 claims
- 1077US6763907B2Vehicle steering apparatusKOYO SEIKO CO·Filed 2003·Granted Jul 20, 2004·26 cites·18 claims
- 1176US6364051B1Electric power steering systemKOYO SEIKO CO·Filed 2000·Granted Apr 2, 2002·25 cites·14 claims
- 1275US6470250B2Vehicle attitude control apparatusKOYO SEIKO CO·Filed 2001·Granted Oct 22, 2002·25 cites·6 claims
- 1372US8224528B2Vehicle steering apparatusHAYAMA RYOUHEI·Filed 2008·Granted Jul 17, 2012·8 cites·3 claims
- 1471US8862329B2Control apparatus for steering mechanismJTEKT CORP·Filed 2012·Granted Oct 14, 2014·4 cites·18 claims
- 1571US7233850B2Vehicle steering apparatusKOYO SEIKO CO·Filed 2003·Granted Jun 19, 2007·22 cites·25 claims
- 1667US6382345B2Electric power steering systemKOYO SEIKO CO·Filed 2001·Granted May 7, 2002·17 cites·9 claims
- 1766US6719088B2Vehicle steering apparatusKOYO SEIKO CO·Filed 2003·Granted Apr 13, 2004·16 cites·6 claims
- 1864US8185270B2Vehicle steering deviceHAYAMA RYOUHEI·Filed 2007·Granted May 22, 2012·6 cites·12 claims
- 1963US8660749B2Motor vehicle steering systemHAYAMA RYOUHEI·Filed 2007·Granted Feb 25, 2014·6 cites·16 claims
- 2063US6450592B1Motor vehicle braking systemKOYO SEIKO CO·Filed 2001·Granted Sep 17, 2002·7 cites·2 claims
- 2162US9043091B2Vehicle steering systemJTEKT CORP·Filed 2012·Granted May 26, 2015·3 cites·5 claims
- 2262US7147080B2Steering apparatus for vehicleKOYO SEIKO CO·Filed 2003·Granted Dec 12, 2006·13 cites·15 claims
- 2362US6968262B2Steering angle correction deviceKOYO SEIKO CO·Filed 2003·Granted Nov 22, 2005·14 cites·4 claims
- 2458US9448137B2Test systemJTEKT CORP·Filed 2014·Granted Sep 20, 2016·1 cites·6 claims
- 2557US8744687B2Vehicle steering apparatusHAYAMA RYOUHEI·Filed 2012·Granted Jun 3, 2014·2 cites·4 claims
- 2656US8467939B2Motor vehicle steering systemHAYAMA RYOUHEI·Filed 2011·Granted Jun 18, 2013·2 cites·6 claims
- 2755US9126618B2Vehicle steering systemJTEKT CORP·Filed 2013·Granted Sep 8, 2015·2 cites·6 claims
- 2853US9227657B2Vehicle steering systemJTEKT CORP·Filed 2014·Granted Jan 5, 2016·2 cites·21 claims
- 2951US8909429B2Vehicle steering systemJTEKT CORP·Filed 2012·Granted Dec 9, 2014·1 cites·5 claims
- 3046US6516916B2Steering deviceKOYO SEIKO CO·Filed 2002·Granted Feb 11, 2003·5 cites·1 claims
- 3143US8131426B2Vehicle steering systemMAEDA SHINGO·Filed 2007·Granted Mar 6, 2012·0 cites·6 claims
- 3236US2002013646A1Motor vehicle steering systemFiled 2001·Application pending·0 cites
- 3333US9988081B2Steering systemJTEKT CORP·Filed 2016·Granted Jun 5, 2018·0 cites·6 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →