Inventor · disambiguated record
Tohru Iwahashi
Also filed as: IWAHASHI TOHRU
3 granted patents·40 citations·filing 1981–1988
71Inventor score
Files withSUMITOMO METAL IND3
Top patents by PatentIndex Score
3 records- 0164US4402824AProcess for refining coal-based heavy oilsSUMITOMO METAL IND·Filed 1981·Granted Sep 6, 1983·17 cites·9 claims
- 0254US4671907AMethod of manufacturing carbon materialsSUMITOMO METAL IND·Filed 1985·Granted Jun 9, 1987·14 cites·7 claims
- 0351US5066384AProcess for refining coal-derived heavy carbonaceous materialsSUMITOMO METAL IND·Filed 1988·Granted Nov 19, 1991·9 cites·14 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →