Inventor · disambiguated record
Masahiko Yahagi
Also filed as: YAHAGI MASAHIKO
41 granted patents·3 pending applications·717 citations·filing 1992–2009
98Inventor score
Top patents by PatentIndex Score
44 records- 0191US7873351B2Communication restriction control system and communication restriction control methodNEC CORP·Filed 2006·Granted Jan 18, 2011·24 cites·27 claims
- 0283US7065360B2Multi-network communications systemNEC CORP·Filed 2002·Granted Jun 20, 2006·33 cites·16 claims
- 0378US7634264B2Mobile communication system, mobile terminal, base station, radio network controller, information rate control method therefor and program thereforNEC CORP·Filed 2005·Granted Dec 15, 2009·6 cites·8 claims
- 0477US7742754B2Mobile communication system and method for determining base station antenna proximity stateNEC CORP·Filed 2007·Granted Jun 22, 2010·6 cites·12 claims
- 0577US6035210ATransmission power control apparatus for a mobile communication systemNEC CORP·Filed 1997·Granted Mar 7, 2000·87 cites·25 claims
- 0673US8423062B2Mobile communication system, mobile terminal, base station, radio network controller, information rate control method therefor and program thereforYAHAGI MASAHIKO·Filed 2009·Granted Apr 16, 2013·4 cites·5 claims
- 0771US8576735B2Broadcast system, broadcast management device, broadcast method, and terminalYAHAGI MASAHIKO·Filed 2009·Granted Nov 5, 2013·3 cites·12 claims
- 0870US7630720B2Content distribution system, network, and channel switching control methodNEC CORP·Filed 2008·Granted Dec 8, 2009·3 cites·25 claims
- 0969US6370378B1Cellular communicating network and method for locating mobile stations using hierarchically arranged databasesNEC CORP·Filed 1999·Granted Apr 9, 2002·59 cites·20 claims
- 1068US7983665B2Mobile communication system, mobile terminal, base station, radio network controller, information rate control method therefor and program thereforNEC CORP·Filed 2009·Granted Jul 19, 2011·2 cites·10 claims
- 1168US7519369B2Content distribution system, network, and channel switching control methodNEC CORP·Filed 2003·Granted Apr 14, 2009·10 cites·33 claims
- 1267US7623499B2Mobile terminal management system, mobile terminal, agent, and programNEC CORP·Filed 2002·Granted Nov 24, 2009·11 cites·32 claims
- 1367US5642401ASystem and method of authenticating a service request in a mobile communication systemNEC CORP·Filed 1994·Granted Jun 24, 1997·69 cites·11 claims
- 1465US7580669B2Content distribution system, method for distributing content and computer program thereofNEC CORP·Filed 2007·Granted Aug 25, 2009·2 cites·9 claims
- 1565US6118983ACDMA communication system capable of controlling transmission power in each base station without interferenceNEC CORP·Filed 1997·Granted Sep 12, 2000·62 cites·18 claims
- 1660US5613199AMobile communication system and a mobile station paging methodNEC CORP·Filed 1995·Granted Mar 18, 1997·41 cites·6 claims
- 1759US6131035ACommunication channel assigning systemNEC CORP·Filed 1998·Granted Oct 10, 2000·32 cites·20 claims
- 1858US7257368B2Content distribution system, method for distributing content and computer program thereofNEC CORP·Filed 2003·Granted Aug 14, 2007·4 cites·18 claims
- 1957US8116770B2Mobile communications system and control method thereofYAHAGI MASAHIKO·Filed 2007·Granted Feb 14, 2012·1 cites·28 claims
- 2057US5428817AMobile communication system having variable coverage areasNEC CORP·Filed 1993·Granted Jun 27, 1995·46 cites·9 claims
- 2151US9509423B2Broadcast system, broadcast control apparatus, and broadcast methodYAHAGI MASAHIKO·Filed 2009·Granted Nov 29, 2016·0 cites·17 claims
- 2251US2008214206A1Communication terminal, communication system using same, and information displaying program product and information displaying method for communication terminalSHIMANUKI MASAHIRO·Filed 2008·Application pending·0 cites
- 2348US2011092237A1Wireless communication system, management server, mobile base station apparatus and mobile base station control methodKATO TETSUYA·Filed 2009·Application pending·0 cites
- 2446US6973046B2User fee charging system in which traffic is determined through sampling operationNEC CORP·Filed 2001·Granted Dec 6, 2005·0 cites·16 claims
- 2545US5517679AMobile radio telecommunications system with a battery savingNEC CORP·Filed 1994·Granted May 14, 1996·26 cites·4 claims
- 2645US2004078478A1Data transmission rate regulating system, monitor and control apparatus of data transmission rate, and data transmission rate regulating method to be used in the sameNEC CORP·Filed 2003·Application pending·0 cites
- 2743US6477159B1Mobile communication system and a method thereofNEC CORP·Filed 1999·Granted Nov 5, 2002·17 cites·14 claims
- 2843US5619551ACellular telephone exchange system which allows setting of connections between the base station transmitter-receivers and base station controllers base on movement of the mobile stationNEC CORP·Filed 1994·Granted Apr 8, 1997·23 cites·2 claims
- 2942US6442176B1Signal transmission system in a mobile communication networkNEC CORP·Filed 1999·Granted Aug 27, 2002·15 cites·24 claims
- 3041US9182496B2Access method for communication terminalKATAYAMA HIDEYUKI·Filed 2009·Granted Nov 10, 2015·0 cites·7 claims
- 3141US8825075B2Timing of synchronizing signalKATAYAMA HIDEYUKI·Filed 2009·Granted Sep 2, 2014·0 cites·7 claims
- 3241US8594020B2Wireless communication system, control apparatus, communication method switching method, and programOKAMOTO TSUKASA·Filed 2009·Granted Nov 26, 2013·0 cites·12 claims
- 3341US8570891B2Wireless communication system, control apparatus, communication method switching method, and programOKAMOTO TSUKASA·Filed 2009·Granted Oct 29, 2013·0 cites·9 claims
- 3441US8442018B2Wireless communication system, router apparatus, wireless communication method, and programOKAMOTO TSUKASA·Filed 2009·Granted May 14, 2013·0 cites·12 claims
- 3540US5542094AMobile communication system making use of ISDN switched networkNEC CORP·Filed 1995·Granted Jul 30, 1996·15 cites·4 claims
- 3640US5404576ABase station coverage area control systemNEC CORP·Filed 1992·Granted Apr 4, 1995·19 cites·5 claims
- 3739US5590174AApparatus and method for mobile communication network which ensures that a user who is out of a service area can receive an incoming call from another service areaNEC CORP·Filed 1994·Granted Dec 31, 1996·18 cites·11 claims
- 3838US5832383AMobile communication method and systemNEC CORP·Filed 1995·Granted Nov 3, 1998·11 cites·17 claims
- 3938US5438609AMobile communication method for completing calls utilizing a mobility manager and system thereforNEC CORP·Filed 1994·Granted Aug 1, 1995·16 cites·13 claims
- 4037US5519697AISDN-served cell-site stations with means for distributing calls to mobile switching systemsNEC CORP·Filed 1994·Granted May 21, 1996·20 cites·7 claims
- 4136US6483818B1Simultaneous paging signal sending system, sending method used therefor, and recording medium on which control program therefor is recordedNEC CORP·Filed 1999·Granted Nov 19, 2002·13 cites·20 claims
- 4235US6571107B1Connection between mobile stations using different speech coding rulesNEC CORP·Filed 1999·Granted May 27, 2003·7 cites·6 claims
- 4334US5640391ARelocation control of substrate channelsNEC CORP·Filed 1994·Granted Jun 17, 1997·10 cites·12 claims
- 4426US5588039AMobile communication system capable of avoiding local congestionNEC CORP·Filed 1994·Granted Dec 24, 1996·2 cites·2 claims
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