Inventor · disambiguated record
Shoichi Narahashi
Also filed as: NARAHASHI SHOICHI
73 granted patents·5 pending applications·955 citations·filing 1991–2013
99Inventor score
Files withNTT DOCOMO INC48KAWAI KUNIHIRO10FUKUDA ATSUSHI6NIPPON TELEGRAPH & TELEPHONE5OHKAWARA JUNYA4
Top patents by PatentIndex Score
78 records- 0197US8086191B2Leakage power reduction apparatusFUKUDA ATSUSHI·Filed 2008·Granted Dec 27, 2011·72 cites·15 claims
- 0297US7538635B2Quadrature hybrid circuit having variable reactances at the four ports thereofNTT DOCOMO INC·Filed 2006·Granted May 26, 2009·56 cites·15 claims
- 0396US7183847B2Multi-band look-up table type predistorterNTT DOCOMO INC·Filed 2005·Granted Feb 27, 2007·51 cites·3 claims
- 0495US7656228B2Matching circuit and multi-band amplifierNTT DOCOMO INC·Filed 2007·Granted Feb 2, 2010·39 cites·15 claims
- 0595US7634238B2Multi-band lookup table type predistorterNTT DOCOMO INC·Filed 2006·Granted Dec 15, 2009·30 cites·3 claims
- 0695US7336128B2Feed forward amplifier for multiple frequency bandsNTT DOCOMO INC·Filed 2006·Granted Feb 26, 2008·36 cites·14 claims
- 0794US7583168B2ResonatorNTT DOCOMO INC·Filed 2005·Granted Sep 1, 2009·26 cites·21 claims
- 0893US7539464B2Power series type predistorter for multi-frequency bands operationNTT DOCOMO INC·Filed 2006·Granted May 26, 2009·25 cites·11 claims
- 0993US7170344B2Multi-band predistorter using power series representationNTT DOCOMO INC·Filed 2005·Granted Jan 30, 2007·29 cites·19 claims
- 1092US7602241B2Multiband Doherty amplifierNTT DOCOMO INC·Filed 2007·Granted Oct 13, 2009·24 cites·2 claims
- 1192US5166634AFeed-forward amplifierNIPPON TELEGRAPH & TELEPHONE·Filed 1991·Granted Nov 24, 1992·84 cites·34 claims
- 1291US8106727B2Variable resonator, tunable filter, and electric circuit deviceKAWAI KUNIHIRO·Filed 2008·Granted Jan 31, 2012·17 cites·22 claims
- 1387US8294537B2Variable resonator, variable bandwidth filter, and electric circuit deviceKAWAI KUNIHIRO·Filed 2007·Granted Oct 23, 2012·12 cites·24 claims
- 1487US7573356B2Tunable filterNTT DOCOMO INC·Filed 2007·Granted Aug 11, 2009·13 cites·20 claims
- 1586US7907678B2Power series predistorter and control method thereofNTT DOCOMO INC·Filed 2006·Granted Mar 15, 2011·17 cites·9 claims
- 1686US7795965B2Cryogenic receiving amplifier and amplifying methodNTT DOCOMO INC·Filed 2008·Granted Sep 14, 2010·15 cites·9 claims
- 1786US7378924B2Filter with improved capacitive coupling portionNTT DOCOMO INC·Filed 2005·Granted May 27, 2008·13 cites·3 claims
- 1886US7245195B2Coplanar waveguide filter and method of forming sameNTT DOCOMO INC·Filed 2005·Granted Jul 17, 2007·13 cites·17 claims
- 1985US6208204B1Feedforward amplifierNIPPON TELEGRAPH & TELEPHONE·Filed 1999·Granted Mar 27, 2001·58 cites·17 claims
- 2083US9337990B2Front-end circuit and impedance adjustment methodNTT DOCOMO INC·Filed 2013·Granted May 10, 2016·7 cites·3 claims
- 2182US7750757B2Matching circuitNTT DOCOMO INC·Filed 2009·Granted Jul 6, 2010·7 cites·3 claims
- 2282US7292124B2Variable resonator and variable phase shifterNTT DOCOMO INC·Filed 2005·Granted Nov 6, 2007·9 cites·11 claims
- 2381US8564384B2Variable resonator, tunable bandwidth filter, and electric circuit deviceNTT DOCOMO INC·Filed 2012·Granted Oct 22, 2013·4 cites·12 claims
- 2480US6963758B2High-sensitivity wireless receiving device and high-frequency unit used thereforNTT DOCOMO INC·Filed 2001·Granted Nov 8, 2005·23 cites·25 claims
- 2579US8184739B2Power series digital predistorter and control method thereforOHKAWARA JUNYA·Filed 2010·Granted May 22, 2012·9 cites·15 claims
- 2679US7825754B2Variable resonatorNTT DOCOMO INC·Filed 2006·Granted Nov 2, 2010·7 cites·11 claims
- 2779US7327996B2High sensitivity radio receiverNTT DOCOMO INC·Filed 2003·Granted Feb 5, 2008·20 cites·10 claims
- 2879US7126422B2Multi-band feed-forward amplifier and adjustment method thereforNTT DOCOMO INC·Filed 2005·Granted Oct 24, 2006·7 cites·24 claims
- 2978US7397331B2Coupling structure, resonator excitation structure and filter for coplanar-waveguide circuitNTT DOCOMO INC·Filed 2006·Granted Jul 8, 2008·7 cites·7 claims
- 3078US5796307AAmplifying device having input and output nonlinear phase shifters of opposite phase-frequency characteristicsNIPPON TELEGRAPH & TELEPHONE·Filed 1996·Granted Aug 18, 1998·40 cites·32 claims
- 3177US8368483B2Multiband matching circuit and multiband power amplifierNTT DOCOMO INC·Filed 2010·Granted Feb 5, 2013·5 cites·12 claims
- 3276US7948311B2Power series predistorter and control method thereofNTT DOCOMO INC·Filed 2009·Granted May 24, 2011·6 cites·11 claims
- 3374US7508269B2Stabilization circuit and multiband amplification circuitNTT DOCOMO INC·Filed 2006·Granted Mar 24, 2009·8 cites·10 claims
- 3473US8648666B2Multimode frontend circuitKAWAI KUNIHIRO·Filed 2011·Granted Feb 11, 2014·4 cites·9 claims
- 3572US8295789B2Multi-band lookup table type predistorterSUZUKI YASUNORI·Filed 2009·Granted Oct 23, 2012·6 cites·10 claims
- 3671US7656249B2Matching circuitNTT DOCOMO INC·Filed 2008·Granted Feb 2, 2010·7 cites·10 claims
- 3771US7385450B2Bias circuitNTT DOCOMO INC·Filed 2006·Granted Jun 10, 2008·7 cites·13 claims
- 3868US8330562B2Variable resonator, tunable filter, and electric circuit deviceKAWAI KUNIHIRO·Filed 2012·Granted Dec 11, 2012·2 cites·13 claims
- 3967US8760244B2Multirole circuit element capable of operating as variable resonator or transmission line and variable filter incorporating the sameKAWAI KUNIHIRO·Filed 2011·Granted Jun 24, 2014·2 cites·21 claims
- 4067US8324988B2Variable resonator, tunable bandwidth filter, and electric circuit deviceKAWAI KUNIHIRO·Filed 2008·Granted Dec 4, 2012·4 cites·20 claims
- 4166US7764147B2Coplanar resonator and filter using the sameNTT DOCOMO INC·Filed 2006·Granted Jul 27, 2010·3 cites·9 claims
- 4265US7902922B2Feedforward amplifier and control method thereofNTT DOCOMO INC·Filed 2009·Granted Mar 8, 2011·5 cites·7 claims
- 4364US8487713B2Multiband matching circuit and multiband power amplifierFUKUDA ATSUSHI·Filed 2010·Granted Jul 16, 2013·3 cites·12 claims
- 4462US8073407B2Radio communication device and power supplying method for radio communication deviceFUKUDA ATSUSHI·Filed 2008·Granted Dec 6, 2011·2 cites·8 claims
- 4562US7710222B2Dual band resonator and dual band filterNTT DOCOMO INC·Filed 2008·Granted May 4, 2010·2 cites·10 claims
- 4662US5790555ASignal multiplexer and multiplexing methodNIPPON TELEGRAPH & TELEPHONE·Filed 1995·Granted Aug 4, 1998·47 cites·38 claims
- 4761US7710217B2Matching circuit and dual-band power amplifierNTT DOCOMO INC·Filed 2007·Granted May 4, 2010·2 cites·8 claims
- 4861US7564699B2Planar circuit housingNTT DOCOMO INC·Filed 2005·Granted Jul 21, 2009·2 cites·7 claims
- 4960US8125302B2Signal selecting deviceKAWAI KUNIHIRO·Filed 2008·Granted Feb 28, 2012·2 cites·11 claims
- 5060US6480706B1High sensitivity radio receiverNIPPON TELEGRAPH & TELEPHONE·Filed 1999·Granted Nov 12, 2002·30 cites·16 claims
Showing the top 50 of 78 patent records by PatentIndex Score.
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