Inventor · disambiguated record
Katsumasa Kikkawa
Also filed as: KIKKAWA KATSUMASA
7 granted patents·13 citations·filing 1985–2008
78Inventor score
Top patents by PatentIndex Score
7 records- 0164US8118881B2Hair dye and hair dye compositionYAMAGUCHI MASAHIKO·Filed 2008·Granted Feb 21, 2012·2 cites·14 claims
- 0246US5041560AFluoran compoundHODOGAYA CHEMICAL CO LTD·Filed 1989·Granted Aug 20, 1991·2 cites·1 claims
- 0343US4612558AFluoran compoundsHODOGAYA CHEMICAL CO LTD·Filed 1985·Granted Sep 16, 1986·4 cites·5 claims
- 0432US4987262ACycloalkene compounds useful in recording materialsHODOGAYA CHEMICAL CO LTD·Filed 1989·Granted Jan 22, 1991·3 cites·3 claims
- 0532US4642663A6-tetrahydrofurfurylaminofluoran compound useful as a color former on an heat sensitive recording sheetHODOGAYA CHEMICAL CO LTD·Filed 1985·Granted Feb 10, 1987·1 cites·11 claims
- 0628US4597795A6-tetrahydrofurfurylaminofluoran compound useful as a color formerHODOGAYA CHEMICAL CO LTD·Filed 1985·Granted Jul 1, 1986·1 cites·3 claims
- 0727US4839334AHeat sensitive recording sheetHODOGAYA CHEMICAL CO LTD·Filed 1987·Granted Jun 13, 1989·0 cites·3 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →