Inventor · disambiguated record
Masakatsu Nakatsuka
Also filed as: NAKATSUKA MASAKATSU
43 granted patents·544 citations·filing 1985–2008
98Inventor score
Top patents by PatentIndex Score
43 records- 0192US6929870B2Hydrocarbon compounds, materials for organic electroluminescent elements and organic electroluminescent elementsMITSUI CHEMICALS INC·Filed 2001·Granted Aug 16, 2005·33 cites·16 claims
- 0291US4824882APolarizing filmMITSUI TOATSU CHEMICALS·Filed 1985·Granted Apr 25, 1989·78 cites·4 claims
- 0390US5281570AThermochromic materialsMITSUI TOATSU CHEMICALS·Filed 1992·Granted Jan 25, 1994·49 cites·12 claims
- 0489US4960538A1,2-naphthalocyanine near-infrared absorbent and recording/display materials using sameMITSUI TOATSU CHEMICALS·Filed 1988·Granted Oct 2, 1990·24 cites·16 claims
- 0586US5059356APolarizing filmMITSUI TOATSU CHEMICALS·Filed 1990·Granted Oct 22, 1991·67 cites·4 claims
- 0679US5072021AOptically active naphthalene derivativesMITSUI TOATSU CHEMICALS·Filed 1990·Granted Dec 10, 1991·16 cites·3 claims
- 0778US5286418APolarizing filmMITSUI TOATSU CHEMICALS·Filed 1991·Granted Feb 15, 1994·44 cites·2 claims
- 0877US6383982B1Color developer composition, aqueous dispersion, recording sheet and color developing inkMITSUI CHEMICALS INC·Filed 2000·Granted May 7, 2002·17 cites·18 claims
- 0976US8294144B2Organic transistorFUJIYAMA TAKAHIRO·Filed 2008·Granted Oct 23, 2012·3 cites·2 claims
- 1076US7166240B2Hydrocarbon compounds, materials for organic electroluminescent elements and organic electroluminescent elementsMITSUI CHEMICALS INC·Filed 2004·Granted Jan 23, 2007·17 cites·24 claims
- 1176US5426170AMethod for preparing an aromatic polycarbonateMITSUI TOATSU CHEMICALS·Filed 1993·Granted Jun 20, 1995·24 cites·21 claims
- 1269US4970021APhthalocyanine compounds and utility thereofMITSUI TOATSU CHEMICALS·Filed 1988·Granted Nov 13, 1990·9 cites·3 claims
- 1366US5647896AColor-developing agents and color-developing sheetsMITSUI TOATSU CHEMICALS·Filed 1995·Granted Jul 15, 1997·17 cites·19 claims
- 1466US5270281AHeat-sensitive recording materials and phenol compoundsMITSUI TOATSU CHEMICALS·Filed 1992·Granted Dec 14, 1993·8 cites·4 claims
- 1563US5196507AProcess for producing granules of polycarbonate and composition thereofMITSUI TOATSU CHEMICALS·Filed 1992·Granted Mar 23, 1993·18 cites·21 claims
- 1658US5391806AHeat-sensitive recording materials and phenol compoundsMITSUI TOATSU CHEMICALS·Filed 1993·Granted Feb 21, 1995·5 cites·20 claims
- 1755US5300473ARecording material comprising crystal of fluoran compoundMITSUI TOATSU CHEMICALS·Filed 1993·Granted Apr 5, 1994·6 cites·4 claims
- 1854US5525686APolyvalent metal salt of salicyclic acid resin and process for preparing itMITSUI TOATSU CHEMICALS·Filed 1994·Granted Jun 11, 1996·9 cites·6 claims
- 1951US5770108APyrimidine compound and liquid crystal composition and liquid crystal element using the sameMITSUI TOATSU CHEMICALS·Filed 1996·Granted Jun 23, 1998·13 cites·16 claims
- 2051US5359117AProcesses for producing aromatic polycarbonate oligomer and aromatic polycarbonateMITSUI TOATSU CHEMICALS·Filed 1993·Granted Oct 25, 1994·8 cites·17 claims
- 2151US5306688ASalicylic acid derivatives, the process for preparing the same and the heat-sensitive recording materials comprising thereofMITSUI TOATSU CHEMICALS·Filed 1992·Granted Apr 26, 1994·4 cites·12 claims
- 2251US5208209AFluoran compounds, process for preparation thereof and recording materials comprising said compoundMITSUI TOATSU CHEMICALS·Filed 1991·Granted May 4, 1993·5 cites·4 claims
- 2351US5169556ALiquid crystal compositionFUJITSU LTD·Filed 1990·Granted Dec 8, 1992·10 cites·16 claims
- 2450US5300661AProcess for preparation of a recording material comprising a novel crystal of a fluoran compoundMITSUI TOATSU CHEMICALS·Filed 1993·Granted Apr 5, 1994·4 cites·3 claims
- 2549US5185453ACrystal of fluoran compoundMITSUI TOATSU CHEMICALS·Filed 1991·Granted Feb 9, 1993·2 cites·1 claims
- 2647US5354513APolarizing filmMITSUI TOATSU CHEMICALS·Filed 1993·Granted Oct 11, 1994·11 cites·2 claims
- 2747US5348685AFerroelectric liquid crystal compositionFUJITSU LTD·Filed 1993·Granted Sep 20, 1994·9 cites·6 claims
- 2847US5302571ACrystals of fluoran compound, crystalline solvates thereof, process for their preparation and recording material comprising said crystal or said solvateMITSUI TOATSU CHEMICALS·Filed 1993·Granted Apr 12, 1994·2 cites·11 claims
- 2946US5346878ARecording materialMITSUI TOATSU CHEMICALS·Filed 1993·Granted Sep 13, 1994·3 cites·20 claims
- 3045US6217793B1Acetylene compound, liquid crystal composition and liquid crystal elementMITSUI CHEMICALS INC·Filed 1999·Granted Apr 17, 2001·3 cites·13 claims
- 3143US5283222ARecording material comprising novel crystalline fluoran and process for prepartion of the said crystalline fluoranMITSUI TOATSU CHEMICALS·Filed 1992·Granted Feb 1, 1994·2 cites·7 claims
- 3243US4963449AP-amino substituted tetraphenylthiophenes and electrophotographic photoreceptors containing themMITSUI TOATSU CHEMICALS·Filed 1988·Granted Oct 16, 1990·4 cites·13 claims
- 3342US5861108ANaphthalene compound, and liquid crystal composition and liquid crystal element using the sameMITSUI CHEMICALS INC·Filed 1996·Granted Jan 19, 1999·7 cites·11 claims
- 3442US5324704AFluoran compounds, crystalline toluene adducts thereof, recording material comprising same and process for their preparationMITSUI TOATSU CHEMICALS·Filed 1993·Granted Jun 28, 1994·2 cites·13 claims
- 3541US5380814AAromatic polycarbonate and process for production thereofMITSUI TOATSU CHEMICALS·Filed 1993·Granted Jan 10, 1995·4 cites·12 claims
- 3641US5220038AFluoran compounds, crystalline toluene adducts thereof, recording material comprising same and process for their preparationMITSUI TOATSU CHEMICALS·Filed 1990·Granted Jun 15, 1993·1 cites·20 claims
- 3741US5023343AP-amino substituted tetraphenylthiophenes and electrophotographic photoreceptors containing themMITSUI TOATSU CHEMICALS·Filed 1990·Granted Jun 11, 1991·1 cites·7 claims
- 3840US5194632AFluoran compound, useful in heat sensitive recording materialsMITSUI TOATSU CHEMICALS·Filed 1990·Granted Mar 16, 1993·2 cites·1 claims
- 3940US5087706AFluoran compounds, process for preparation thereof and recording materials comprising said compoundMITSUI TOATSU CHEMICALS·Filed 1990·Granted Feb 11, 1992·2 cites·4 claims
- 4035US5476957ASalicylic acid derivativesMITSUI TOATSU CHEMICALS·Filed 1994·Granted Dec 19, 1995·1 cites·15 claims
- 4134US5245049ACrystals of fluoran compound, crystalline solvates thereof and process for their preparationMITSUI TOATSU CHEMICALS·Filed 1991·Granted Sep 14, 1993·0 cites·33 claims
- 4232US5231069AFluoran compound, heat sensitive recording materials comprising fluoran compoundMITSUI TOATSU CHEMICALS·Filed 1992·Granted Jul 27, 1993·0 cites·4 claims
- 4332US5210221ACrystal of fluoran compound and preparation process of the crystalMITSUI TOATSU CHEMICALS·Filed 1991·Granted May 11, 1993·0 cites·13 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →