Inventor · disambiguated record
Masaki Okubo
Also filed as: OKUBO MASAKI
14 granted patents·5 pending applications·71 citations·filing 1992–2023
90Inventor score
Files withHODOGAYA CHEMICAL CO LTD9KOBELCO CONSTR MACH CO LTD2OTSUKA HIDEYUKI2YASUMURA MASATERU2AMANO YUKI1
Top patents by PatentIndex Score
19 records- 0185US5312707AElectrophotographic photoconductor and diamine compounds for use in the sameRICOH KK·Filed 1992·Granted May 17, 1994·35 cites·23 claims
- 0282US7709172B2Oxidized mixed cyclic phenol sulfides, and charge control agents and toners using the sameHODOGAYA CHEMICAL CO LTD·Filed 2008·Granted May 4, 2010·6 cites·8 claims
- 0381US7402369B2Mono azo iron complex compound, and charge controlling agent and toner using the sameHODOGAYA CHEMICAL CO LTD·Filed 2006·Granted Jul 22, 2008·5 cites·10 claims
- 0477US7901858B2Mixed cyclic phenol sulfides, and charge control agents and toners using the sameHODOGAYA CHEMICAL CO LTD·Filed 2008·Granted Mar 8, 2011·5 cites·3 claims
- 0576US7820832B2Oxidized mixed cyclic phenol sulfides, and charge control agents and toners using the sameHODOGAYA CHEMICAL CO LTD·Filed 2009·Granted Oct 26, 2010·4 cites·8 claims
- 0672US9703223B2Toner, developer, and toner cartridgeHODOGAYA CHEMICAL CO LTD·Filed 2014·Granted Jul 11, 2017·2 cites·9 claims
- 0761US9893038B2Light-emitting device having first and second wiring patternsNICHIA CORP·Filed 2016·Granted Feb 13, 2018·1 cites·8 claims
- 0859US7094512B2Electrophotographic printing method, monoazo iron complex compound, charge controlling agent using the same and toner using the charge controlling agentHODOGAYA CHEMICAL CO LTD·Filed 2003·Granted Aug 22, 2006·7 cites·29 claims
- 0958US8580470B2Charge control agent composition and toner utilizing the sameOTSUKA HIDEYUKI·Filed 2007·Granted Nov 12, 2013·2 cites·10 claims
- 1058US2025214811A1Rotation control device of work machine and work machine equipped with sameKOBELCO CONSTR MACH CO LTD·Filed 2023·Application pending·0 cites
- 1150US12280990B2Winch drive device in craneKOBELCO CONSTR MACH CO LTD·Filed 2021·Granted Apr 22, 2025·0 cites·9 claims
- 1250US9835965B2Charge control agent and toner using sameHODOGAYA CHEMICAL CO LTD·Filed 2014·Granted Dec 5, 2017·0 cites·9 claims
- 1348US2012315573A1Charge control agent composition and toner utilizing the sameOTSUKA HIDEYUKI·Filed 2012·Application pending·0 cites
- 1444US6627368B2Organic metal complex compound and electrostatic image developing toner using the sameHODOGAYA CHEMICAL CO LTD·Filed 2000·Granted Sep 30, 2003·4 cites·4 claims
- 1543US9141014B2Toner for developing electrostatic charge imageOKUBO MASAKI·Filed 2012·Granted Sep 22, 2015·0 cites·8 claims
- 1642US2011045396A1Charge Controlling Agent and Toner Using Metal Compound of Cyclic Phenol SulfideHODOGAYA CHEMICAL CO LTD·Filed 2009·Application pending·0 cites
- 1736US2013177844A1Charge control agent and toner using sameYASUMURA MASATERU·Filed 2011·Application pending·0 cites
- 1831US2012315576A1Charge controlling agent and toner using sameYASUMURA MASATERU·Filed 2011·Application pending·0 cites
- 1930US8962866B2Surface-modified silica powder and method for producing the same, as well as toner composition for electrophotographyAMANO YUKI·Filed 2012·Granted Feb 24, 2015·0 cites·11 claims
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →