Inventor · disambiguated record
Yuugo Kumagai
Also filed as: KUMAGAI YUUGO
3 granted patents·38 citations·filing 1985–1989
71Inventor score
Files withHITACHI CHEMICAL CO LTD3
Top patents by PatentIndex Score
3 records- 0157US4985328ADry toner, dry developer and process for forming electrophotographic imagesHITACHI CHEMICAL CO LTD·Filed 1989·Granted Jan 15, 1991·20 cites·31 claims
- 0257US4686166AElectrophoto toner comprising imido group monomer unit in polymerHITACHI CHEMICAL CO LTD·Filed 1986·Granted Aug 11, 1987·11 cites·6 claims
- 0343US4950574AToner for developing electrostatic image comprising vinyl polymer having hydroxyl number of 50 to 350HITACHI CHEMICAL CO LTD·Filed 1985·Granted Aug 21, 1990·7 cites·11 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →