Inventor · disambiguated record
Masahito Tomizawa
Also filed as: TOMIZAWA MASAHITO
45 granted patents·3 pending applications·365 citations·filing 1995–2021
97Inventor score
Files withNIPPON TELEGRAPH & TELEPHONE25NTT ELECTRONICS CORP12KISAKA YOSHIAKI2YAMAZAKI ETSUSHI2AISAWA SHIGEKI1
Top patents by PatentIndex Score
48 records- 0194US9621299B2Coherent communication system, communication method, and transmission methodNIPPON TELEGRAPH & TELEPHONE·Filed 2014·Granted Apr 11, 2017·15 cites·22 claims
- 0293US6202082B1Trunk transmission networkNIPPON TELEGRAPH & TELEPHONE·Filed 1997·Granted Mar 13, 2001·110 cites·17 claims
- 0389US7116917B2Optical transmitter and optical transmission systemNIPPON TELEGRAPH & TELEPHONE·Filed 2002·Granted Oct 3, 2006·32 cites·24 claims
- 0489US6598092B2Trunk transmission networkNIPPON TELEGRAPH & TELEPHONE·Filed 2000·Granted Jul 22, 2003·28 cites·6 claims
- 0588US7734194B2Optical transmission system, optical transmitter for optical transmission system, and optical receiver for optical transmission systemNIPPON TELEGRAPH & TELEPHONE·Filed 2005·Granted Jun 8, 2010·16 cites·5 claims
- 0687US8005374B2Optical transmission system, optical transmitter for optical transmission system, and optical receiver for optical transmission systemNIPPON TELEGRAPH & TELEPHONE·Filed 2010·Granted Aug 23, 2011·10 cites·6 claims
- 0786US7002968B1Transport system and transport methodNIPPON TELEGRAPH & TELEPHONE·Filed 2000·Granted Feb 21, 2006·26 cites·30 claims
- 0884US7536108B2High precision chromatic dispersion measuring method and automatic dispersion compensating optical link system that uses this methodNIPPON TELEGRAPH & TELEPHONE·Filed 2002·Granted May 19, 2009·30 cites·39 claims
- 0980US10608743B2Transmission characteristic compensation apparatus, transmission characteristic compensation method, and communication apparatusNTT ELECTRONICS CORP·Filed 2017·Granted Mar 31, 2020·4 cites·14 claims
- 1080US5574717ALine terminating equipment in SDH networks, using forward error correcting codesNIPPON TELEGRAPH & TELEPHONE·Filed 1995·Granted Nov 12, 1996·51 cites·13 claims
- 1178US8135285B2Optical transmission system and methodKISAKA YOSHIAKI·Filed 2006·Granted Mar 13, 2012·8 cites·3 claims
- 1273US10038507B2Optical transmission system, phase compensation method, and optical reception apparatusNIPPON TELEGRAPH & TELEPHONE·Filed 2014·Granted Jul 31, 2018·3 cites·16 claims
- 1372US10868617B2Chromatic dispersion compensation device, chromatic dispersion compensation method, and communication deviceNTT ELECTRONICS CORP·Filed 2017·Granted Dec 15, 2020·2 cites·9 claims
- 1472US10305675B2Data phase tracking device, data phase tracking method and communication deviceNTT ELECTRONICS CORP·Filed 2017·Granted May 28, 2019·2 cites·16 claims
- 1571US10171173B2Optical signal transmission apparatus and optical signal transmission methodNIPPON TELEGRAPH & TELEPHONE·Filed 2015·Granted Jan 1, 2019·2 cites·18 claims
- 1671US7970008B2Multiplexing transmission system and multiplexing transmission methodNIPPON TELEGRAPH & TELEPHONE·Filed 2007·Granted Jun 28, 2011·4 cites·20 claims
- 1766US11683093B2Wavelength dispersion compensation apparatus, optical receiving apparatus, wavelength dispersion compensation method and computer programNIPPON TELEGRAPH & TELEPHONE·Filed 2019·Granted Jun 20, 2023·1 cites·8 claims
- 1866US8977120B2Client signal accommodating multiplexing apparatus and methodOHARA TAKUYA·Filed 2011·Granted Mar 10, 2015·3 cites·8 claims
- 1966US8514881B2Digital transmission system and digital transmission methodKISAKA YOSHIAKI·Filed 2008·Granted Aug 20, 2013·4 cites·20 claims
- 2065US10880193B2Error correction device, error correction method, and communication deviceNTT ELECTRONICS CORP·Filed 2017·Granted Dec 29, 2020·1 cites·8 claims
- 2164US10374718B2Optical transmission distortion compensation device, optical transmission distortion compensation method, and communication deviceNTT ELECTRONICS CORP·Filed 2017·Granted Aug 6, 2019·1 cites·13 claims
- 2261US9698932B2Optical transmission/reception system, transmitter, receiver, and optical transmission/reception methodNIPPON TELEGRAPH & TELEPHONE·Filed 2014·Granted Jul 4, 2017·1 cites·10 claims
- 2359US11201721B2Frame synchronization apparatus, optical communication apparatus, and frame synchronization methodNTT ELECTRONICS CORP·Filed 2021·Granted Dec 14, 2021·0 cites·4 claims
- 2458US11323238B2Frame synchronization apparatus, optical communication apparatus, and frame synchronization methodNTT ELECTRONICS CORP·Filed 2019·Granted May 3, 2022·0 cites·11 claims
- 2556US7095758B2Multiplexing and transmission apparatusNIPPON TELEGRAPH & TELEPHONE·Filed 2001·Granted Aug 22, 2006·3 cites·16 claims
- 2652US7424230B2Digital transmission systemNIPPON TELEGRAPH & TELEPHONE·Filed 2002·Granted Sep 9, 2008·2 cites·31 claims
- 2750US9160479B2Client signal mapping circuit and mapping methodSUZUKI MASAHIRO·Filed 2011·Granted Oct 13, 2015·0 cites·8 claims
- 2848US11916685B2Transmission apparatus and transmission methodNIPPON TELEGRAPH & TELEPHONE·Filed 2019·Granted Feb 27, 2024·0 cites·8 claims
- 2948US10122462B2Transport apparatus and transport methodNIPPON TELEGRAPH & TELEPHONE·Filed 2014·Granted Nov 6, 2018·0 cites·11 claims
- 3048US9438365B2Client signal mapping circuit and mapping methodNIPPON TELEGRAPH & TELEPHONE·Filed 2015·Granted Sep 6, 2016·0 cites·8 claims
- 3148US8571037B2Optical digital transmission systemAISAWA SHIGEKI·Filed 2009·Granted Oct 29, 2013·1 cites·14 claims
- 3246US12170607B2Transmission apparatus, transmission system and delay adjustment methodNIPPON TELEGRAPH & TELEPHONE·Filed 2019·Granted Dec 17, 2024·0 cites·4 claims
- 3346US11671119B2Signal processing apparatus and signal processing methodNIPPON TELEGRAPH & TELEPHONE·Filed 2019·Granted Jun 6, 2023·0 cites·2 claims
- 3445US10128818B2Data processor, data processing method and communication deviceNTT ELECTRONICS CORP·Filed 2017·Granted Nov 13, 2018·0 cites·10 claims
- 3543US9667350B2Optical receiving device and phase cycle reduction methodNIPPON TELEGRAPH & TELEPHONE·Filed 2014·Granted May 30, 2017·0 cites·15 claims
- 3642US12119867B2Transmission apparatus and transmission methodNIPPON TELEGRAPH & TELEPHONE·Filed 2019·Granted Oct 15, 2024·0 cites·4 claims
- 3742US2003170035A1Optical transmission apparatusFiled 2003·Application pending·0 cites
- 3841US10419127B2Phase compensation device, phase compensation method and communication apparatusNTT ELECTRONICS CORP·Filed 2017·Granted Sep 17, 2019·0 cites·8 claims
- 3941US2004131363A1Polarization mode dispersion compensation method and polarization mode dispersion compensation deviceFiled 2003·Application pending·0 cites
- 4039US11923862B2Transmission apparatus and transmission systemNIPPON TELEGRAPH & TELEPHONE·Filed 2019·Granted Mar 5, 2024·0 cites·8 claims
- 4139US10523335B2Known signal detection methodNTT ELECTRONICS CORP·Filed 2017·Granted Dec 31, 2019·0 cites·7 claims
- 4239US2004114638A1Multiplexing relay transmission deviceFiled 2002·Application pending·0 cites
- 4337US11329764B2Error correction device, error correction method, and optical communication systemNTT ELECTRONICS CORP·Filed 2018·Granted May 10, 2022·0 cites·20 claims
- 4437US10122465B2Digital signal processing device and optical transceiver apparatusNTT ELECTRONICS CORP·Filed 2016·Granted Nov 6, 2018·0 cites·5 claims
- 4535US6034974AChannel-selection-type demultiplexing circuitNIPPON TELEGRAPH & TELEPHONE·Filed 1997·Granted Mar 7, 2000·5 cites·15 claims
- 4634US8254789B2Device and method for adjusting chromatic dispersionMATTHEUS ARNOLD·Filed 2003·Granted Aug 28, 2012·0 cites·20 claims
- 4733US9178614B2Method for estimating amount of wavelength dispersion, wavelength dispersion compensation circuit, and receiving deviceYAMAZAKI ETSUSHI·Filed 2012·Granted Nov 3, 2015·0 cites·39 claims
- 4832US8971703B2Wavelength dispersion amount estimation method, wavelength dispersion compensation circuit, and reception deviceYAMAZAKI ETSUSHI·Filed 2012·Granted Mar 3, 2015·0 cites·30 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →