Inventor · disambiguated record
Tsutomu Nakagawa
Also filed as: NAKAGAWA TSUTOMU
24 granted patents·2 pending applications·294 citations·filing 1975–2016
96Inventor score
Files withMITSUBISHI ELECTRIC CORP5RICOH KK4DAINIPPON PRINTING CO LTD2AGENCY IND SCIENCE TECHN1ASAHI CHEMICAL IND1
Top patents by PatentIndex Score
26 records- 0195US9741839B1Gate structure of thyristorPOWEREX INC·Filed 2016·Granted Aug 22, 2017·20 cites·26 claims
- 0289US5923933AElectrophotographic apparatusHITACHI KOKI KK·Filed 1998·Granted Jul 13, 1999·49 cites·14 claims
- 0387US7580657B2Developing device in image-forming deviceRICOH KK·Filed 2006·Granted Aug 25, 2009·9 cites·18 claims
- 0479US4948508ASurface-hydrophilic, highly selective semipermeable membraneASAHI CHEMICAL IND·Filed 1989·Granted Aug 14, 1990·45 cites·8 claims
- 0573US8041269B2Development apparatus having two developer bearers and two development chambersRICOH CO LTD·Filed 2007·Granted Oct 18, 2011·4 cites·14 claims
- 0673US4975769AApparatus for color modification adapted to represent the pictorial imageDAI NIPPON INSATSU KAUSHIKI KA·Filed 1988·Granted Dec 4, 1990·29 cites·5 claims
- 0771US7683150B2Water-absorbent polymer and process for producing the sameASAHI KASEI CHEMICALS CORP·Filed 2006·Granted Mar 23, 2010·4 cites·8 claims
- 0869US7324778B2Fixing device including heating roller and pressure rollerRICOH PRINTING SYS LTD·Filed 2005·Granted Jan 29, 2008·3 cites·6 claims
- 0969US5173189AMembrane for separating an organic solvent from a water-organic solvent mixtureLINTEC CORP·Filed 1991·Granted Dec 22, 1992·33 cites·21 claims
- 1068US7792466B2Image forming apparatus and developing deviceRICOH KK·Filed 2007·Granted Sep 7, 2010·3 cites·16 claims
- 1168US7689153B2Image forming system having charge balancing systemRICOH KK·Filed 2005·Granted Mar 30, 2010·3 cites·10 claims
- 1267US4881118ASemiconductor deviceMITSUBISHI ELECTRIC CORP·Filed 1989·Granted Nov 14, 1989·35 cites·12 claims
- 1365US8939865B2Roller bearingNAKAGAWA TSUTOMU·Filed 2012·Granted Jan 27, 2015·3 cites·10 claims
- 1460US9303690B2Rolling bearingNTN TOYO BEARING CO LTD·Filed 2012·Granted Apr 5, 2016·1 cites·2 claims
- 1559US7792441B2Image formation apparatusRICOH KK·Filed 2007·Granted Sep 7, 2010·2 cites·3 claims
- 1656US4420612ACatalyst membraneDIRECTOR GENEREAL OF AGENCY OF·Filed 1983·Granted Dec 13, 1983·15 cites·7 claims
- 1754US7538791B2Color monitor white chromaticity measuring deviceDAINIPPON PRINTING CO LTD·Filed 2004·Granted May 26, 2009·2 cites·16 claims
- 1850US5393995ASemiconductor thyristor device with recessMITSUBISHI ELECTRIC CORP·Filed 1993·Granted Feb 28, 1995·15 cites·9 claims
- 1944US9273725B2Rolling bearingFUKAMI RINO·Filed 2010·Granted Mar 1, 2016·0 cites·7 claims
- 2043US4559551ASemiconductor deviceMITSUBISHI ELECTRIC CORP·Filed 1984·Granted Dec 17, 1985·7 cites·3 claims
- 2140US2013148919A1Rolling bearing and manufacturing method thereofMATSUO AKIRA·Filed 2011·Application pending·0 cites
- 2239US2006132867A1Tone reproduction characteristics measuring device for color monitorSUGIYAMA TOHRU·Filed 2004·Application pending·0 cites
- 2336US5278640AColor modification utilizing two coefficientsDAINIPPON PRINTING CO LTD·Filed 1990·Granted Jan 11, 1994·5 cites·2 claims
- 2433US4639276AMethod of making thyristor with a high tolerable bias voltageMITSUBISHI ELECTRIC CORP·Filed 1985·Granted Jan 27, 1987·5 cites·7 claims
- 2530US4586070AThyristor with abrupt anode emitter junctionMITSUBISHI ELECTRIC CORP·Filed 1985·Granted Apr 29, 1986·1 cites·3 claims
- 2630US4000126ATranslucent film and method for manufacturing the sameAGENCY IND SCIENCE TECHN·Filed 1975·Granted Dec 28, 1976·1 cites·4 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →