Inventor · disambiguated record
Kazumasa Ito
Also filed as: ITO KAZUMASA
110 granted patents·21 pending applications·1,937 citations·filing 1988–2023
99Inventor score
Files withMITSUBISHI ELECTRIC CORP31NIHON KOHDEN CORP28RICOH ELEMEX CORP18YAMAHA MARINE KK9YAMAHA MOTOR CO LTD8
Top patents by PatentIndex Score
131 records- 0197US5244425AWater injection propulsion unitSANSHIN KOGYO KK·Filed 1991·Granted Sep 14, 1993·66 cites·33 claims
- 0296US10910892B2Rotary electric machine and electric power steering apparatusMITSUBISHI ELECTRIC CORP·Filed 2015·Granted Feb 2, 2021·12 cites·23 claims
- 0393US10404124B2Rotary electric machineMITSUBISHI ELECTRIC CORP·Filed 2016·Granted Sep 3, 2019·7 cites·13 claims
- 0493US5197460AMouth cavity sanitary deviceRICOH ELEMEX CORP·Filed 1991·Granted Mar 30, 1993·169 cites·3 claims
- 0592US8464025B2Signal processing apparatus with signal control units and processor units operating based on different threadsYAMAGUCHI YUJI·Filed 2006·Granted Jun 11, 2013·50 cites·18 claims
- 0692US7422495B2Operation control system for small boatYAMAHA MARINE KK·Filed 2006·Granted Sep 9, 2008·24 cites·14 claims
- 0792US6855014B2Control for watercraft propulsion systemYAMAHA MARINE KK·Filed 2003·Granted Feb 15, 2005·40 cites·26 claims
- 0892US5246367AMouth cavity sanitary deviceRICOH ELEMEX CORP·Filed 1992·Granted Sep 21, 1993·167 cites·2 claims
- 0991US7080717B2Emergency brake apparatus of elevatorMITSUBISHI ELECTRIC CORP·Filed 2003·Granted Jul 25, 2006·36 cites·10 claims
- 1090US7267201B2Emergency brake device of elevatorMITSUBISHI ELECTRIC CORP·Filed 2001·Granted Sep 11, 2007·29 cites·6 claims
- 1190US5197458AMouth cavity sanitary deviceRICOH ELEMEX CORP·Filed 1991·Granted Mar 30, 1993·142 cites·1 claims
- 1289US7647143B2Speed control device for water jet propulsion boatYAMAHA MOTOR CO LTD·Filed 2005·Granted Jan 12, 2010·29 cites·15 claims
- 1389US7438688B2Apparatus and method for measuring pulse rateNIHON KOHDEN CORP·Filed 2006·Granted Oct 21, 2008·17 cites·14 claims
- 1489US7201620B2Operation control system for planing boatYAMAHA MARINE KK·Filed 2006·Granted Apr 10, 2007·20 cites·20 claims
- 1589US6889654B2Electronic throttle control for watercraftYAMAHA MARINE KK·Filed 2004·Granted May 10, 2005·36 cites·14 claims
- 1686US5503257ABrake shoe for elevator safety deviceMITSUBISHI ELECTRIC CORP·Filed 1994·Granted Apr 2, 1996·38 cites·10 claims
- 1785US11018616B2Electric driving apparatus and electric power steering apparatusMITSUBISHI ELECTRIC CORP·Filed 2017·Granted May 25, 2021·3 cites·11 claims
- 1885US4966115AControl means of internal combustion engine for marine propulsionSANSHIN KOGYO KK·Filed 1988·Granted Oct 30, 1990·30 cites·15 claims
- 1984US10833549B2Rotary electric machineMITSUBISHI ELECTRIC CORP·Filed 2016·Granted Nov 10, 2020·3 cites·13 claims
- 2084US10342465B2Medical photometer and medical photometer control methodNIHON KOHDEN CORP·Filed 2017·Granted Jul 9, 2019·2 cites·5 claims
- 2183US7605514B2Electric machineMITSUBISHI ELECTRIC CORP·Filed 2007·Granted Oct 20, 2009·12 cites·13 claims
- 2282US5628385AElevator overspeed protection apparatusMITSUBISHI ELECTRIC CORP·Filed 1995·Granted May 13, 1997·38 cites·15 claims
- 2381US9825515B2Synchronous reluctance motor having radial-direction widths slit configuration on a q-axis for improved power factorMITSUBISHI ELECTRIC CORP·Filed 2014·Granted Nov 21, 2017·4 cites·12 claims
- 2481US7008225B2Tooth brusherRICOH ELEMEX CORP·Filed 2001·Granted Mar 7, 2006·36 cites·2 claims
- 2581US5234364AExhaust system for small planing boatSANSHIN KOGYO KK·Filed 1991·Granted Aug 10, 1993·52 cites·48 claims
- 2680US8485633B2Droplet detecting device and inkjet printerITO KAZUMASA·Filed 2010·Granted Jul 16, 2013·3 cites·5 claims
- 2779US8274182B2Linear motor including extended tooth tipsNAKAYAMA MISA·Filed 2008·Granted Sep 25, 2012·13 cites·10 claims
- 2879US7025728B2Method for reducing noise, and pulse photometer using the methodNIHON KOHDEN CORP·Filed 2003·Granted Apr 11, 2006·111 cites·14 claims
- 2979US6223723B1Personal watercraft engine controlYAMAHA MOTOR CO LTD·Filed 1999·Granted May 1, 2001·25 cites·12 claims
- 3079US5355882APulse oximeterNIHON KOHDEN CORP·Filed 1993·Granted Oct 18, 1994·234 cites·2 claims
- 3178US10855121B2Rotary electric machine, electric power steering device, and method of manufacturing a rotary electric machineMITSUBISHI ELECTRIC CORP·Filed 2016·Granted Dec 1, 2020·2 cites·12 claims
- 3278US7857153B2Artificial nipple, infant feeding device, and artificial nipple manufacturing methodPIGEON CORP·Filed 2005·Granted Dec 28, 2010·14 cites·15 claims
- 3378US6077135ATorsional damper for watercraft propulsion systemYAMAHA MOTOR CO LTD·Filed 1997·Granted Jun 20, 2000·27 cites·30 claims
- 3477US9289166B2Biological information monitoring apparatus and biological information monitoring methodITO KAZUMASA·Filed 2012·Granted Mar 22, 2016·10 cites·13 claims
- 3576US10702196B2Pulse photometerNIHON KOHDEN CORP·Filed 2017·Granted Jul 7, 2020·2 cites·14 claims
- 3676US8573365B2Emergency brake apparatus for elevator systemITO KAZUMASA·Filed 2007·Granted Nov 5, 2013·9 cites·11 claims
- 3776US5970951AOver-rev restriction system for engine powering a personal watercraftYAMAHA MOTOR CO LTD·Filed 1997·Granted Oct 26, 1999·31 cites·15 claims
- 3875US10389193B2Reluctance motor and manufacturing method for rotor core used in reluctance motorMITSUBISHI ELECTRIC CORP·Filed 2016·Granted Aug 20, 2019·2 cites·9 claims
- 3974US7364480B2Engine output control system for water jet propulsion boatYAMAHA MARINE KK·Filed 2005·Granted Apr 29, 2008·7 cites·16 claims
- 4074US5096446AExhaust silencer unit for propulsion unitSANSHIN KOGYO KANUSHIKI KAISHA·Filed 1990·Granted Mar 17, 1992·46 cites·23 claims
- 4173US11411445B2Permanent-magnet synchronous motor and electric power steering deviceMITSUBISHI ELECTRIC CORP·Filed 2017·Granted Aug 9, 2022·1 cites·17 claims
- 4273US7513807B2Operation control system for planing boatYAMAHA MOTOR CO LTD·Filed 2006·Granted Apr 7, 2009·9 cites·18 claims
- 4372US9755470B2Rotary electric machine and electric power steering device using rotary electric machineMITSUBISHI ELECTRIC CORP·Filed 2015·Granted Sep 5, 2017·3 cites·17 claims
- 4472US8366234B2Inkjet recording apparatusRICOH ELEMEX CORP·Filed 2009·Granted Feb 5, 2013·3 cites·8 claims
- 4572US7942494B2Liquid-discharge-failure detecting apparatus, and inkjet inkjet recording apparatusRICOH ELEMEX CORP·Filed 2008·Granted May 17, 2011·3 cites·9 claims
- 4672US7862141B2Liquid-discharge-failure detecting apparatus and inkjet recording apparatusRICOH ELEMEX CORP·Filed 2008·Granted Jan 4, 2011·3 cites·15 claims
- 4772US7815280B2Liquid-discharge-failure detecting apparatus and inkjet recording apparatusRICOH ELEMEX CORP·Filed 2008·Granted Oct 19, 2010·3 cites·5 claims
- 4870US12446806B2Medical photometer and medical photometry systemNIHON KOHDEN CORP·Filed 2023·Granted Oct 21, 2025·0 cites·6 claims
- 4970US7037147B2Engine control system for watercraftYAMAHA MARINE KK·Filed 2003·Granted May 2, 2006·12 cites·47 claims
- 5069US7428951B2Brake device for elevatorMITSUBISHI ELECTRIC CORP·Filed 2004·Granted Sep 30, 2008·12 cites·7 claims
Showing the top 50 of 131 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →