Inventor · disambiguated record
Manabu Kai
Also filed as: KAI MANABU
91 granted patents·18 pending applications·799 citations·filing 1993–2019
99Inventor score
Top patents by PatentIndex Score
109 records- 0197US7248221B2Radio tag antenna structure for an optical recording medium and a case for an optical recording medium with a radio tag antennaFUJITSU LTD·Filed 2004·Granted Jul 24, 2007·170 cites·18 claims
- 0291US7323994B2RFID tagFUJITSU LTD·Filed 2005·Granted Jan 29, 2008·27 cites·33 claims
- 0391US7277017B2RFID tagFUJITSU LTD·Filed 2005·Granted Oct 2, 2007·28 cites·5 claims
- 0490US7486192B2RFID tag with frequency adjusting portionFUJITSU LTD·Filed 2006·Granted Feb 3, 2009·23 cites·12 claims
- 0590US6873864B2Superconductive filter module, superconductive filter assembly and heat insulating type coaxial cableFUJITSU LTD·Filed 2001·Granted Mar 29, 2005·26 cites·31 claims
- 0689US7659863B2Tag antennaFUJITSU LTD·Filed 2005·Granted Feb 9, 2010·20 cites·5 claims
- 0788US8912960B1Antenna apparatusFUJITSU LTD·Filed 2014·Granted Dec 16, 2014·10 cites·12 claims
- 0888US7538738B2Tag-use antenna and tag using the sameFUJITSU LTD·Filed 2006·Granted May 26, 2009·17 cites·7 claims
- 0988US7218184B2Superconducting filterFUJITSU LTD·Filed 2004·Granted May 15, 2007·25 cites·20 claims
- 1086US7446727B2Cross dipole antenna and tag using the sameFUJITSU LTD·Filed 2006·Granted Nov 4, 2008·17 cites·11 claims
- 1185US9563838B2Loop antenna and radio frequency tagFUJITSU LTD·Filed 2016·Granted Feb 7, 2017·5 cites·12 claims
- 1285US7570225B2Antenna and non-contact tagFUJITSU LTD·Filed 2007·Granted Aug 4, 2009·16 cites·12 claims
- 1384US8763745B2SnowmobileNAGAO TOKINARI·Filed 2010·Granted Jul 1, 2014·5 cites·11 claims
- 1484US7586414B2Radio tagFUJITSU LTD·Filed 2006·Granted Sep 8, 2009·12 cites·4 claims
- 1584US7548167B2RF tag and method of manufacturing the RF tagFUJITSU LTD·Filed 2008·Granted Jun 16, 2009·14 cites·14 claims
- 1683US7378972B2RFID tagFUJITSU LTD·Filed 2006·Granted May 27, 2008·11 cites·16 claims
- 1783US6547021B1Decompression arrangement for land vehicleYAMAHA MOTOR CO LTD·Filed 2000·Granted Apr 15, 2003·22 cites·21 claims
- 1882US9922283B2RFID tag and high frequency circuitFUJITSU LTD·Filed 2017·Granted Mar 20, 2018·4 cites·20 claims
- 1982US9010648B2Antenna and RFID tagFUJITSU LTD·Filed 2013·Granted Apr 21, 2015·6 cites·5 claims
- 2081US8134505B2RF tag and method of manufacturing the RF tagYAMAGAJO TAKASHI·Filed 2008·Granted Mar 13, 2012·12 cites·13 claims
- 2181US7598873B2RFID tag and manufacturing method thereofFUJITSU LTD·Filed 2006·Granted Oct 6, 2009·12 cites·9 claims
- 2281US7342498B2Radio frequency identification (RFID) tag and manufacturing method thereofFUJITSU LTD·Filed 2004·Granted Mar 11, 2008·29 cites·22 claims
- 2379US7580000B2Folding dipole antenna and tag using the sameFUJITSU LTD·Filed 2006·Granted Aug 25, 2009·11 cites·7 claims
- 2478US8068057B2RFID tagYAMAGAJO TAKASHI·Filed 2007·Granted Nov 29, 2011·10 cites·3 claims
- 2578US6859029B2System and method for monitoring high-frequency circuitsFUJITSU LTD·Filed 2003·Granted Feb 22, 2005·13 cites·22 claims
- 2677US10030577B2VehicleYAMAHA MOTOR CO LTD·Filed 2015·Granted Jul 24, 2018·3 cites·11 claims
- 2777US8022878B2RFID tag and manufacturing method thereofFUJITSU LTD·Filed 2007·Granted Sep 20, 2011·6 cites·2 claims
- 2877US7408467B2Antenna and RFID tag mounting the sameFUJITSU LTD·Filed 2005·Granted Aug 5, 2008·7 cites·9 claims
- 2976US8742992B2Planar inverted F antennaKAI MANABU·Filed 2012·Granted Jun 3, 2014·5 cites·8 claims
- 3076US8462052B2RFID tag and manufacturing method thereofYAMAGAJO TAKASHI·Filed 2011·Granted Jun 11, 2013·3 cites·1 claims
- 3176US7916032B2Radio frequency identification (RFID) tag and manufacturing method thereofFUJITSU LTD·Filed 2008·Granted Mar 29, 2011·7 cites·6 claims
- 3276US7324058B2Tag antenna, tag and RFID system using the sameFUJITSU LTD·Filed 2006·Granted Jan 29, 2008·9 cites·9 claims
- 3376US5445121AEngine operational control unitYAMAHA MOTOR CO LTD·Filed 1993·Granted Aug 29, 1995·27 cites·31 claims
- 3475US7911404B2RF tag and method of producing RF tagFUJITSU LTD·Filed 2008·Granted Mar 22, 2011·8 cites·8 claims
- 3575US7516901B2RFID tagFUJITSU LTD·Filed 2005·Granted Apr 14, 2009·6 cites·12 claims
- 3674US7205954B2Meander line antennaFUJITSU LTD·Filed 2005·Granted Apr 17, 2007·8 cites·5 claims
- 3773US10862212B2Antenna device and wireless communication deviceFUJITSU LTD·Filed 2018·Granted Dec 8, 2020·2 cites·11 claims
- 3873US8570173B2Radio frequency tag and method of manufacturing the sameKAI MANABU·Filed 2010·Granted Oct 29, 2013·3 cites·21 claims
- 3973US7928921B2Tag-use antenna and tag using the sameFUJITSU LTD·Filed 2008·Granted Apr 19, 2011·6 cites·6 claims
- 4073US6980841B2Filter device having spiral resonators connected by a linear sectionFUJITSU LTD·Filed 2004·Granted Dec 27, 2005·10 cites·6 claims
- 4172US10454176B2Antenna apparatus and electronic deviceFUJITSU LTD·Filed 2017·Granted Oct 22, 2019·2 cites·5 claims
- 4271US9688354B2SnowmobileYAMAHA MOTOR CO LTD·Filed 2014·Granted Jun 27, 2017·5 cites·36 claims
- 4371US8537070B2Antenna sheet, tag, and method of manufacturing tagKAI MANABU·Filed 2011·Granted Sep 17, 2013·3 cites·12 claims
- 4471US8397994B2Wireless tagKAI MANABU·Filed 2010·Granted Mar 19, 2013·3 cites·13 claims
- 4570US8215562B2Wireless tagKAI MANABU·Filed 2010·Granted Jul 10, 2012·3 cites·9 claims
- 4670US8172149B2Wireless frequency tag and method for manufacturing wireless frequency tagYAMAGAJO TAKASHI·Filed 2010·Granted May 8, 2012·3 cites·3 claims
- 4770US7650174B2Superconductive filter capable of easily adjusting filter characteristic and filter characteristic adjusting methodFUJITSU LTD·Filed 2006·Granted Jan 19, 2010·4 cites·9 claims
- 4869US8528826B2Wireless tag and manufacturing methodBABA SHUNJI·Filed 2011·Granted Sep 10, 2013·2 cites·2 claims
- 4969US8022886B2Crossed dual tag apparatus and system using crossed dual tag apparatusFUJITSU LTD·Filed 2008·Granted Sep 20, 2011·6 cites·17 claims
- 5069US7132999B2Meander line antennaFUJITSU LTD·Filed 2005·Granted Nov 7, 2006·6 cites·6 claims
Showing the top 50 of 109 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when Manabu Kai files or is granted a new patent.
We store only your email — no account needed. See our privacy policy.
Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →