Inventor · disambiguated record
Hiroya Ishiguro
Also filed as: ISHIGURO HIROYA
7 granted patents·72 citations·filing 2001–2017
80Inventor score
Top patents by PatentIndex Score
7 records- 0192US6676468B2Method of producing a spark plugDENSO CORP·Filed 2001·Granted Jan 13, 2004·40 cites·40 claims
- 0285US6642638B2Spark plug with Ir-alloy chipDENSO CORP·Filed 2001·Granted Nov 4, 2003·28 cites·14 claims
- 0382US8994257B2Spark plug for internal combustion engine and method for manufacturing sameDENSO CORP·Filed 2013·Granted Mar 31, 2015·4 cites·4 claims
- 0444US10389091B2Spark plug for internal combustion engine and ignition system having spark plugDENSO CORP·Filed 2013·Granted Aug 20, 2019·0 cites·9 claims
- 0542US8398447B2Method for manufacturing spark plug for internal-combustion engineHANASHI KEN·Filed 2012·Granted Mar 19, 2013·0 cites·17 claims
- 0639US8339021B2Spark plug for internal-combustion engine and method for manufacturing the sameHANASHI KEN·Filed 2008·Granted Dec 25, 2012·0 cites·15 claims
- 0733US10148068B2Spark plug and semi-finished product thereofDENSO CORP·Filed 2017·Granted Dec 4, 2018·0 cites·15 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →