Inventor · disambiguated record
Iwao Hiraishi
Also filed as: HIRAISHI IWAO
7 granted patents·1 pending application·23 citations·filing 2007–2019
79Inventor score
Top patents by PatentIndex Score
8 records- 0184US7493882B2Combination of a cylinder liner and a piston ringNIPPON PISTON RING CO LTD·Filed 2007·Granted Feb 24, 2009·13 cites·4 claims
- 0281US8820750B2Internal combustion engine oil ringCHIBA ATSUSHI·Filed 2011·Granted Sep 2, 2014·5 cites·20 claims
- 0376US11047479B2Method for producing piston ring with recessNIPPON PISTON RING CO LTD·Filed 2019·Granted Jun 29, 2021·0 cites·17 claims
- 0470US10030772B2Multi-piece oil ringCHIBA ATSUSHI·Filed 2010·Granted Jul 24, 2018·2 cites·16 claims
- 0567US9464717B2Piston ringITO MICHIHIRO·Filed 2011·Granted Oct 11, 2016·3 cites·11 claims
- 0659US10330198B2Multi-piece oil ringNIPPON PISTON RING CO LTD·Filed 2018·Granted Jun 25, 2019·0 cites·9 claims
- 0757US10514097B2Method for producing piston ring with recessNIPPON PISTON RING CO LTD·Filed 2017·Granted Dec 24, 2019·0 cites·18 claims
- 0850US2012205876A1Piston ringFUJIMURA KAZUHIRO·Filed 2009·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →