Inventor · disambiguated record
Masaki Ichihara
Also filed as: ICHIHARA MASAKI
64 granted patents·1 pending application·1,578 citations·filing 1983–2010
99Inventor score
Top patents by PatentIndex Score
65 records- 0198US5196806AOutput level control circuit for use in rf power amplifierNEC CORP·Filed 1991·Granted Mar 23, 1993·156 cites·14 claims
- 0292US7099268B2Orthogonal frequency division multiplex modem circuitNEC CORP·Filed 2001·Granted Aug 29, 2006·69 cites·4 claims
- 0389US5410195ARipple-free phase detector using two sample-and-hold circuitsNEC CORP·Filed 1992·Granted Apr 25, 1995·85 cites·5 claims
- 0489US4841301ADevice operable like an automatic level control circuit for decoding a multivalued signalNEC CORP·Filed 1987·Granted Jun 20, 1989·38 cites·5 claims
- 0588US7664475B2Multi-band wireless transceiver and method of controlling the sameNEC CORP·Filed 2005·Granted Feb 16, 2010·14 cites·22 claims
- 0688US6424124B2System for providing charge between communication devicesNEC CORP·Filed 2000·Granted Jul 23, 2002·80 cites·20 claims
- 0786US5809019ATransmisson diversity systemNEC CORP·Filed 1996·Granted Sep 15, 1998·85 cites·12 claims
- 0885US6591089B1Mobile station with transmission power control systemNEC CORP·Filed 2000·Granted Jul 8, 2003·27 cites·30 claims
- 0984US6587513B1PredistorterNEC CORP·Filed 1999·Granted Jul 1, 2003·70 cites·19 claims
- 1083US4509199APower supply systems for use in radio communication systemsNIPPON ELECTRIC CO·Filed 1983·Granted Apr 2, 1985·35 cites·7 claims
- 1181US6570914B1Amplitude calculation circuitNEC CORP·Filed 2000·Granted May 27, 2003·26 cites·12 claims
- 1279US5784412ATransmitter and method for transmitting a modulated wave with variable envelopeNEC CORP·Filed 1995·Granted Jul 21, 1998·43 cites·14 claims
- 1378US6480063B2Method and circuit for controlling baseband gainNEC CORP·Filed 2001·Granted Nov 12, 2002·18 cites·9 claims
- 1477US6915120B2Information terminal apparatus having a variable directional antenna and control method thereofNEC CORP·Filed 2002·Granted Jul 5, 2005·17 cites·28 claims
- 1574US6330455B1Transmission power controller for use in mobile communication terminal equipmentNEC CORP·Filed 1999·Granted Dec 11, 2001·72 cites·13 claims
- 1673US7228117B2Frequency correction method and apparatus for correcting secular changeNEC CORP·Filed 2004·Granted Jun 5, 2007·11 cites·38 claims
- 1773US6587005B2PLL circuit having a variable output frequencyNEC CORP·Filed 2001·Granted Jul 1, 2003·19 cites·15 claims
- 1873US5329253AFrequency synthesis using frequency controlled carrier modulated with PLL feedback signalNEC CORP·Filed 1992·Granted Jul 12, 1994·36 cites·10 claims
- 1971US7127224B2Baseband circuit incorporated in direct conversion receiver free from direct-current offset voltage without change of cut-off frequencyNEC CORP·Filed 2001·Granted Oct 24, 2006·13 cites·14 claims
- 2071US6229840B1Diversity circuitNEC CORP·Filed 1998·Granted May 8, 2001·49 cites·34 claims
- 2171US5170130APhase lock loop circuit with a subsidiary loop filterNEC CORP·Filed 1991·Granted Dec 8, 1992·33 cites·3 claims
- 2270US7856216B2Diversity receiver and gain adjusting method thereforNEC CORP·Filed 2006·Granted Dec 21, 2010·4 cites·5 claims
- 2370US5878087ASignal communication device operable in a CDMA mode and an FM modeNEC CORP·Filed 1994·Granted Mar 2, 1999·34 cites·14 claims
- 2468US6922451B1Frequency shifting circuit and methodNEC CORP·Filed 2000·Granted Jul 26, 2005·12 cites·6 claims
- 2566US7330729B2Mobile terminal device and positional information systemNEC CORP·Filed 2002·Granted Feb 12, 2008·11 cites·4 claims
- 2666US5355101AQuadrature modulator having circuit for correcting phase errorNEC CORP·Filed 1992·Granted Oct 11, 1994·30 cites·4 claims
- 2764US7069060B2Compound information terminal, mobile communications system and control method thereofNEC CORP·Filed 2002·Granted Jun 27, 2006·8 cites·37 claims
- 2864US6553018B1Method and apparatus for adjusting transmission power of a CDMA terminalNEC CORP·Filed 1999·Granted Apr 22, 2003·39 cites·40 claims
- 2963US8335153B2Orthogonal frequency division multiplex modem circuitICHIHARA MASAKI·Filed 2010·Granted Dec 18, 2012·1 cites·10 claims
- 3063US7206360B2Amplitude deviation correction circuitNEC CORP·Filed 2001·Granted Apr 17, 2007·8 cites·19 claims
- 3162US7257178B2Base band circuit of receiver and low cut-off frequency control methodNEC CORP·Filed 2003·Granted Aug 14, 2007·6 cites·12 claims
- 3262US5926748APortable radio apparatus capable of keeping antenna away from user when callingNEC CORP·Filed 1994·Granted Jul 20, 1999·24 cites·10 claims
- 3361US8050367B2Receiving amplitude correction circuit, receiving amplitude correction method, and receiver using the sameNEC CORP·Filed 2006·Granted Nov 1, 2011·2 cites·9 claims
- 3461US6275699B1Mobile communication terminal for rapid adjustment of a reference frequency to a target frequencyNEC CORP·Filed 1997·Granted Aug 14, 2001·25 cites·9 claims
- 3561US5841320AVariable gain amplifying deviceNEC CORP·Filed 1996·Granted Nov 24, 1998·20 cites·6 claims
- 3660USRE40553EMethod and apparatus for adjusting transmission power of CDMA terminalNEC CORP·Filed 2005·Granted Oct 28, 2008·1 cites·99 claims
- 3760US6434373B2Transmission power control device capable of decreasing current consumptionNEC CORP·Filed 1998·Granted Aug 13, 2002·20 cites·20 claims
- 3860US5491453ANarrow-band filter having a variable center frequencyNEC CORP·Filed 1994·Granted Feb 13, 1996·15 cites·7 claims
- 3958US5255288AArrangement for converting binary input signal into corresponding in-phase and quadrature phase signalsNEC CORP·Filed 1991·Granted Oct 19, 1993·33 cites·3 claims
- 4057US6496937B1Password updating apparatus and recording medium used thereforNEC CORP·Filed 1999·Granted Dec 17, 2002·36 cites·13 claims
- 4155US5640413ADigital mobile radio communication systemNEC CORP·Filed 1994·Granted Jun 17, 1997·41 cites·2 claims
- 4255US5455384AHigh frequency module and method of producing the sameNEC CORP·Filed 1994·Granted Oct 3, 1995·21 cites·5 claims
- 4354US2001029466A1Rewarding method corresponding to object selection on web page and server for use with rewarding methodNEC COPORATION·Filed 2001·Application pending·0 cites
- 4452US7006814B2Direct conversion receiver and transceiverNEC CORP·Filed 2001·Granted Feb 28, 2006·3 cites·12 claims
- 4552US5283583AHigh-speed A/D conversion using a series of one-bit conversion stagesNEC CORP·Filed 1992·Granted Feb 1, 1994·15 cites·4 claims
- 4651US7843803B2Orthogonal frequency division multiplex modem circuitNEC CORP·Filed 2006·Granted Nov 30, 2010·0 cites·42 claims
- 4750US6097715ACDMA communication systemNEC CORP·Filed 1997·Granted Aug 1, 2000·19 cites·38 claims
- 4850US5331230AIntegrated-circuit sampled-and-hold phase detector with integrated current setting resistorNEC CORP·Filed 1992·Granted Jul 19, 1994·14 cites·7 claims
- 4949US8396176B2OFDM receiving device and OFDM receiving methodICHIHARA MASAKI·Filed 2009·Granted Mar 12, 2013·0 cites·17 claims
- 5049US5705912ACircuit for preventing overdischarge of rechargeable battery pack consisting of a plurality of rechargeable batteriesNEC CORP·Filed 1994·Granted Jan 6, 1998·18 cites·10 claims
Showing the top 50 of 65 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →