Inventor · disambiguated record
Yumi Ichikawa
Also filed as: ICHIKAWA YUMI
2 granted patents·16 citations·filing 1994–1995
59Inventor score
Technology areasG03G
Files withRICOH KK2
Top patents by PatentIndex Score
2 records- 0157US5460909APyrazine compound and electrophotographic photoconductor comprising the sameRICOH KK·Filed 1994·Granted Oct 24, 1995·10 cites·2 claims
- 0244US5618935ATricyclic pyrazine compound and electrophotographic photoconductor comprising the sameRICOH KK·Filed 1995·Granted Apr 8, 1997·6 cites·2 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →