Inventor · disambiguated record

Yoshihisa Koiwai

Also filed as: KOIWAI YOSHIHISA

2 granted patents·28 citations·filing 1977–1983

61Inventor score

Technology areasB01J B22F

Files withNIPPON OIL CO LTD1 SUMITOMO METAL IND1

Top patents by PatentIndex Score

2 records

0165US4101635AMethod for regenerating and recycling catalyst for oxidation of sulfur dioxideNIPPON OIL CO LTD·Filed 1977·Granted Jul 18, 1978·18 cites·10 claims
0249US4437883AProcess for producing metal powderSUMITOMO METAL IND·Filed 1983·Granted Mar 20, 1984·10 cites·8 claims

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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →