Inventor · disambiguated record
Yoshitaka Yamakawa
Also filed as: YAMAKAWA YOSHITAKA
19 granted patents·3 pending applications·222 citations·filing 1994–2012
94Inventor score
Top patents by PatentIndex Score
22 records- 0194US6794480B2Monomer containing electron-withdrawing group and electron-donative group, and copolymer and proton-conductive membrane comprising sameJSR CORP·Filed 2002·Granted Sep 21, 2004·80 cites·14 claims
- 0292US7893303B2Polyarylene, process for producing the same, solid polyelectrolyte, and proton-conductive filmJSR CORP·Filed 2005·Granted Feb 22, 2011·14 cites·10 claims
- 0390US6555626B2Polyarylene copolymers and proton-conductive membraneJSR CORP·Filed 2001·Granted Apr 29, 2003·26 cites·10 claims
- 0486US7115699B2Sulfonated polymer having nitrile-containing hydrophobic block and solid polymer electrolyteJSR CORP·Filed 2004·Granted Oct 3, 2006·17 cites·13 claims
- 0585US7906608B2Nitrogenated aromatic compound, process for production of the same, polymer, and proton conductive membraneJSR CORP·Filed 2006·Granted Mar 15, 2011·5 cites·16 claims
- 0681US6812290B2Polyarylene copolymers and proton-conductive membraneJSR CORP·Filed 2002·Granted Nov 2, 2004·11 cites·12 claims
- 0779US8043762B2Polyphenylene-containing electrode pasteJSR CORP·Filed 2006·Granted Oct 25, 2011·3 cites·7 claims
- 0876US7163988B2Aromatic sulfonic acid ester derivative, polyarylene, polyarylene having sulfonic acid group and process for producing the same, and polymer solid electrolyte and proton-conductive membraneJSR CORP·Filed 2003·Granted Jan 16, 2007·13 cites·9 claims
- 0975US6825310B2Halogenated aromatic compound, polymer thereof, and proton-conductive membrane comprising sameJSR CORP·Filed 2002·Granted Nov 30, 2004·15 cites·10 claims
- 1072US8431676B2Aromatic compound and sulfonated polyarylene polymerYAMAKAWA YOSHITAKA·Filed 2007·Granted Apr 30, 2013·5 cites·17 claims
- 1168US8399148B2Varnish for a solid polymer fuel cellHIGAMI MAKOTO·Filed 2011·Granted Mar 19, 2013·1 cites·5 claims
- 1266US8349994B2Electrode electrolyte for polymer-type fuel cell, and use thereofJSR CORP·Filed 2008·Granted Jan 8, 2013·1 cites·2 claims
- 1355US6833426B2Halogenated aromatic compound, (co)polymer thereof, and proton-conductive membrane comprising sameJSR CORP·Filed 2003·Granted Dec 21, 2004·2 cites·10 claims
- 1455US5527860AProcess for producing a diolefin polymer or copolymer and a rubber composition containing such a diolefin polymer or copolymerJAPAN SYNTHETIC RUBBER CO LTD·Filed 1994·Granted Jun 18, 1996·12 cites·19 claims
- 1550US5854384AProcess for preparing poly-α-amino acid particlesJSR CORP·Filed 1996·Granted Dec 29, 1998·10 cites·7 claims
- 1650US2009149625A1Aromatic compound having fluorene skeleton and polyarylene having sulfonic acid groupJSR CORP·Filed 2007·Application pending·0 cites
- 1745US7651802B2Solid polymer electrolyte, proton conductive membrane, electrode electrolyte, electrode paste and membrane-electrode assemblyJSR CORP·Filed 2006·Granted Jan 26, 2010·0 cites·9 claims
- 1844US8309678B2Aromatic compound and polyarylene copolymer having nitrogen-containing heterocycle including sulfonic acid group in side chainKADOTA TOSHIAKI·Filed 2008·Granted Nov 13, 2012·0 cites·5 claims
- 1941US2014154610A1Aromatic copolymer having proton conductive group and uses thereofMURAKAMI TAKUYA·Filed 2012·Application pending·0 cites
- 2036US2012052412A1Polyarylene block copolymer having sulfonic acid group and use thereofYAMAKAWA YOSHITAKA·Filed 2011·Application pending·0 cites
- 2135US8729219B2Polyarylene block copolymer having sulfonic acid group and use thereofYAMAKAWA YOSHITAKA·Filed 2011·Granted May 20, 2014·0 cites·10 claims
- 2234US5593639ABlood-sampling vesselJAPAN SYNTHETIC RUBBER CO LTD·Filed 1995·Granted Jan 14, 1997·7 cites·6 claims
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →