Inventor · disambiguated record
Yasumasa Hirai
Also filed as: HIRAI YASUMASA
4 granted patents·85 citations·filing 1994–2011
73Inventor score
Top patents by PatentIndex Score
4 records- 0182US5952126APolymer solid electrolyte and lithium secondary cell adopting the sameSAMSUNG ELECTRONICS CO LTD·Filed 1997·Granted Sep 14, 1999·77 cites·22 claims
- 0275US8894779B2Bearing steel being excellent both in post spheroidizing-annealing workability and in post quenching-tempering hydrogen fatigue resistance propertyHIRAI YASUMASA·Filed 2011·Granted Nov 25, 2014·2 cites·2 claims
- 0350US9034120B2Bearing steel being excellent both in workability after spheroidizing-annealing and in hydrogen fatigue resistance property after quenching and temperingHIRAI YASUMASA·Filed 2011·Granted May 19, 2015·0 cites·2 claims
- 0438US5512194AAcicular ferromagnetic iron oxide particles and process for producing the sameISHIHARA SANGYO KAISHA·Filed 1994·Granted Apr 30, 1996·6 cites·2 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →