Inventor · disambiguated record
Hisao Oka
Also filed as: OKA HISAO
3 granted patents·42 citations·filing 1991–2012
69Inventor score
Top patents by PatentIndex Score
3 records- 0171US9308589B2DrillSUMITOMO ELECTRIC INDUSTRIES·Filed 2012·Granted Apr 12, 2016·3 cites·7 claims
- 0266US5169521AApparatus for countercurrent chromatography separationsUS HEALTH·Filed 1991·Granted Dec 8, 1992·32 cites·5 claims
- 0360US8562261B2End millOKA HISAO·Filed 2009·Granted Oct 22, 2013·7 cites·10 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →