Inventor · disambiguated record
Hisanaga Yokoyama
Also filed as: YOKOYAMA HISANAGA
3 granted patents·5 citations·filing 2008–2015
57Inventor score
Top patents by PatentIndex Score
3 records- 0187US9840948B2Method for supplying inert gas into poppet valve intermediate and apparatus for supplying inert gas into poppet valve intermediateNITTAN VALVA·Filed 2015·Granted Dec 12, 2017·3 cites·21 claims
- 0268US8689761B2Exhaust poppet valve and solution heat treatment method of the sameTANAKA YASUHITO·Filed 2008·Granted Apr 8, 2014·2 cites·6 claims
- 0349US9334977B2Engine valveNITTAN VALVA·Filed 2012·Granted May 10, 2016·0 cites·2 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →