Assignee
YAMADA CHEM CO
JP·12 granted patents·39 citations·filing 1982–1992
Top patents by PatentIndex Score
12 records- 0176US4598150AChromogenic 1-(3-methoxy-4-alkoxyphenyl)-2-(2'-quinolyl)ethylene compoundsYAMADA CHEM CO·Filed 1984·Granted Jul 1, 1986·9 cites·2 claims
- 0263US4814320AHeat-sensitive recording materialYAMADA CHEM CO·Filed 1987·Granted Mar 21, 1989·7 cites·7 claims
- 0353US4444591AChromogenic compounds and the use thereof as color former in copying or recording materialsYAMADA CHEM CO·Filed 1982·Granted Apr 24, 1984·12 cites·2 claims
- 0446US4835291ADivinyl compounds and chromogenic recording-material prepared by using thereofYAMADA CHEM CO·Filed 1987·Granted May 30, 1989·3 cites·37 claims
- 0545US4564679AChromogenic compoundsYAMADA CHEM CO·Filed 1982·Granted Jan 14, 1986·3 cites·9 claims
- 0639US4820841AChromogenic quinoline compoundsYAMADA CHEM CO·Filed 1986·Granted Apr 11, 1989·2 cites·2 claims
- 0734US4808567ADivinyl compounds and chromogenic recording-material prepared by using thereofYAMADA CHEM CO·Filed 1987·Granted Feb 28, 1989·1 cites·56 claims
- 0834US4747875AChromogenic azaphthalide compound and a colour-forming recording composition containing the sameYAMADA CHEM CO·Filed 1987·Granted May 31, 1988·2 cites·17 claims
- 0929US4845245AProcess for producing 3,3-bis-(4-dimethylaminophenyl)-6-dimethylaminophthalideYAMADA CHEM CO·Filed 1987·Granted Jul 4, 1989·0 cites·3 claims
- 1026US5179066AThermosensitive recording materialYAMADA CHEM CO·Filed 1992·Granted Jan 12, 1993·0 cites·3 claims
- 1123US5286702APhthalide compound and recording material using the compoundYAMADA CHEM CO·Filed 1992·Granted Feb 15, 1994·0 cites·3 claims
- 1222US4892973AProcess for producing 1,1-diphenylalkenesYAMADA CHEM CO·Filed 1988·Granted Jan 9, 1990·0 cites·5 claims
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