Inventor · disambiguated record
Naohisa Oyama
Also filed as: OYAMA NAOHISA
5 granted patents·2 pending applications·220 citations·filing 1996–2023
83Inventor score
Top patents by PatentIndex Score
7 records- 0196US6739177B2Combustible-gas sensor, diagnostic device for intake-oxygen concentration sensor, and air-fuel ratio control device for internal combustion enginesTOYOTA MOTOR CO LTD·Filed 2002·Granted May 25, 2004·98 cites·7 claims
- 0291US6729128B2Emission control apparatus and emission control methodTOYOTA MOTOR CO LTD·Filed 2002·Granted May 4, 2004·66 cites·6 claims
- 0385US6725651B2Reducing agent for emission control system, reducing-agent supply device, and emission control system using the reducing agentTOYOTA MOTOR CO LTD·Filed 2001·Granted Apr 27, 2004·35 cites·17 claims
- 0483US8119988B2Collection-amount detection method for particulate matters and collection-amount detection apparatus therefor and exhaust-gas converting apparatusDAIDO SHIGEKI·Filed 2008·Granted Feb 21, 2012·19 cites·10 claims
- 0554US2023381713A1Gas adsorption system and method of manufacturing the sameDENSO CORP·Filed 2023·Application pending·0 cites
- 0639US2015204224A1Exhaust purification system of internal combustion engineDAIDO SHIGEKI·Filed 2013·Application pending·0 cites
- 0732US5676881AAntiferroelectric liquid crystal compositionNIPPON SOKEN·Filed 1996·Granted Oct 14, 1997·2 cites·6 claims
Join the waitlist — get patent alerts
Get an alert when Naohisa Oyama files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →