Inventor · disambiguated record
Makoto Shibutani
Also filed as: SHIBUTANI MAKOTO
25 granted patents·7 pending applications·486 citations·filing 1989–2016
96Inventor score
Top patents by PatentIndex Score
32 records- 0195US5400391AMobile communication systemNEC CORP·Filed 1994·Granted Mar 21, 1995·228 cites·1 claims
- 0292US8098990B2System and method for providing wireless over a passive optical network (PON)HU JUNQIANG·Filed 2007·Granted Jan 17, 2012·21 cites·16 claims
- 0374US8989603B2Coherent optical receiver and coherent optical receiving methodNEC CORP·Filed 2012·Granted Mar 24, 2015·3 cites·10 claims
- 0469US6414415B1Surface acoustic wave device and method for manufacturing the sameMURATA MANUFACTURING CO·Filed 2000·Granted Jul 2, 2002·18 cites·13 claims
- 0568US5107512AFrequency stabilization of a laser beam by using a birefrigent bodyNEC COPRORATION·Filed 1990·Granted Apr 21, 1992·29 cites·12 claims
- 0665US7855981B2Network system, spanning tree configuration method, spanning tree configuration node, and spanning tree configuration programNEC CORP·Filed 2008·Granted Dec 21, 2010·2 cites·40 claims
- 0763US5023946APolarization diversity optical heterodyne receiver with phase adjustment of two I.F. signals for control of a local optical sourceNEC CORP·Filed 1989·Granted Jun 11, 1991·26 cites·3 claims
- 0861US9419724B2Coherent optical receiver and optical receiving methodSHIBUTANI MAKOTO·Filed 2013·Granted Aug 16, 2016·2 cites·4 claims
- 0958US5847852AOptical networkNEC CORP·Filed 1997·Granted Dec 8, 1998·18 cites·9 claims
- 1058US4972515APolarization diversity receiver having little deteriorated sensitivity despite use of a square-law demodulator having a restricted dynamic rangeNEC CORP·Filed 1989·Granted Nov 20, 1990·22 cites·3 claims
- 1157US7894374B2Network system, spanning tree configuration method, spanning tree configuration node, and spanning tree configuration programNEC CORP·Filed 2003·Granted Feb 22, 2011·3 cites·24 claims
- 1257US7200155B2Communication system capable of efficiently transmitting data from terminals to serverNEC CORP·Filed 2002·Granted Apr 3, 2007·4 cites·40 claims
- 1353US5771111AOptical networkNEC CORP·Filed 1995·Granted Jun 23, 1998·15 cites·3 claims
- 1452US7646789B2Communication system including several communication terminals and server, its communication terminal, its server and data transfer control programNEC CORP·Filed 2003·Granted Jan 12, 2010·2 cites·41 claims
- 1552US5373152AResonance-type optical receiver circuit having a maximum amplifier input controlled by using an amplifier feedback and its method of receivingNEC CORP·Filed 1993·Granted Dec 13, 1994·15 cites·2 claims
- 1650US5504826AOptical module for subcarrier multiplexed optical transmission systemNEC CORP·Filed 1994·Granted Apr 2, 1996·14 cites·4 claims
- 1748US5367156AResonance-type optical receiver and receiving method for low-frequency signalsNEC CORP·Filed 1993·Granted Nov 22, 1994·12 cites·11 claims
- 1847US7783705B2Frame transfer method and node in EthernetNEC CORP·Filed 2003·Granted Aug 24, 2010·0 cites·18 claims
- 1946US5751455AOptical transmission system and optical network terminals used thereinNEC CORP·Filed 1996·Granted May 12, 1998·14 cites·8 claims
- 2046US5371354AResonance-type optical receiver circuit and method of receiving light waveNEC CORP·Filed 1993·Granted Dec 6, 1994·11 cites·3 claims
- 2145US2004047353A1Frame transfer method and node in network, and frame transfer programNEC CORP·Filed 2003·Application pending·0 cites
- 2244US9124372B2Optical transmission system and optical transmission methodNEC CORP·Filed 2013·Granted Sep 1, 2015·0 cites·14 claims
- 2344US2010027994A1Phase Modulation Of An Optical Orthogonal Frequency Division Multiplexing SignalNEC LAB AMERICA INC·Filed 2008·Application pending·0 cites
- 2444US2003043857A1Multiplexing transmission system and its data transfer methodNEC CORP·Filed 2002·Application pending·0 cites
- 2543US2003142626A1Communication system, communication terminal, server and data transfer control programNEC CORP·Filed 2003·Application pending·0 cites
- 2642US9819415B2Interference cancellation device and interference cancellation methodNEC CORP·Filed 2016·Granted Nov 14, 2017·0 cites·20 claims
- 2741US5138476APolarization deversity heterodyne receiver of a baseband combining type in which i.e. signals are adjusted by negative feedback from a device output signalNEC CORP·Filed 1990·Granted Aug 11, 1992·11 cites·4 claims
- 2839US2009022498A1Optical transmission systemSHIBUTANI MAKOTO·Filed 2008·Application pending·0 cites
- 2937US5570219AOptical transmitter for subcarrier frequency multiplexed optical transmission systemNEC CORP·Filed 1995·Granted Oct 29, 1996·12 cites·8 claims
- 3035US2011286746A1Transponder Aggregator Without Wavelength Selector for Colorless and Directionless Multi-Degree ROADM NodeJI PHILIP NAN·Filed 2010·Application pending·0 cites
- 3134US6087756ASurface acoustic waveMURATA MANUFACTURING CO·Filed 1998·Granted Jul 11, 2000·4 cites·14 claims
- 3233US2015244467A1Optical transmission device and optical reception deviceNEC CORP·Filed 2015·Application pending·0 cites
Join the waitlist — get patent alerts
Get an alert when Makoto Shibutani 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 →