Inventor · disambiguated record
Tadao Nakagawa
Also filed as: NAKAGAWA TADAO
19 granted patents·271 citations·filing 1974–2014
94Inventor score
Files withNIPPON TELEGRAPH & TELEPHONE5NISSHIN KOGYO KK4NAKAGAWA TADAO3ISHIHARA KOICHI2NIPPON SEIKI CO LTD2
Top patents by PatentIndex Score
19 records- 0196US8929750B2Signal generating circuit, optical signal transmitting apparatus, signal receiving circuit, method for establishing optical signal synchronization, and optical signal synchronization systemISHIHARA KOICHI·Filed 2010·Granted Jan 6, 2015·53 cites·7 claims
- 0294US9621299B2Coherent communication system, communication method, and transmission methodNIPPON TELEGRAPH & TELEPHONE·Filed 2014·Granted Apr 11, 2017·15 cites·22 claims
- 0391US4168613AOil reservoir device with oil level detector means for a tandem type master cylinderNISSHIN KOGYO KK·Filed 1978·Granted Sep 25, 1979·32 cites·3 claims
- 0487US4020481AFluid level alarm deviceNISSHIN KOGYO KK·Filed 1976·Granted Apr 26, 1977·43 cites·1 claims
- 0581US9614621B2Signal generating circuit, optical signal transmitting apparatus, signal receiving circuit, method for establishing optical signal synchronization, and optical signal synchronization systemNIPPON TELEGRAPH & TELEPHONE·Filed 2014·Granted Apr 4, 2017·4 cites·5 claims
- 0678US9520947B2Signal generating circuit, optical signal transmitting apparatus, signal receiving circuit, method for establishing optical signal synchronization, and optical signal synchronization systemNIPPON TELEGRAPH & TELEPHONE·Filed 2014·Granted Dec 13, 2016·3 cites·7 claims
- 0777US8787769B2Chromatic dispersion value calculating apparatus, optical signal receiving apparatus, optical signal transmitting apparatus, and chromatic dispersion value calculation methodISHIHARA KOICHI·Filed 2010·Granted Jul 22, 2014·5 cites·22 claims
- 0875US6972685B2Liquid level sensorNIPPON SEIKI CO LTD·Filed 2002·Granted Dec 6, 2005·11 cites·8 claims
- 0974US4050549ADisc brake device for motorcycles and the likeNISSHIN KOGYO KK·Filed 1976·Granted Sep 27, 1977·19 cites·1 claims
- 1073US5714896AFractional-N frequency divider systemNIPPON TELEGRAPH & TELEPHONE·Filed 1996·Granted Feb 3, 1998·42 cites·8 claims
- 1167US3946564AOil-hydraulic servo-motorNISSHIN KOGYO KK·Filed 1974·Granted Mar 30, 1976·19 cites·2 claims
- 1265US8855485B2Frequency offset estimating method and frequency offset estimating apparatusNAKAGAWA TADAO·Filed 2011·Granted Oct 7, 2014·2 cites·10 claims
- 1362US8934782B2Transmission method, reception method, transmitter apparatus, and receiver deviceNAKAGAWA TADAO·Filed 2011·Granted Jan 13, 2015·2 cites·22 claims
- 1461US9160600B2Method for receiving frequency domain multiplexed signal and device for receiving frequency domain multiplexed signalKUDO RIICHI·Filed 2010·Granted Oct 13, 2015·2 cites·16 claims
- 1548US5789950ADirect digital synthesizerNIPPON TELEGRAPH & TELEPHONE·Filed 1996·Granted Aug 4, 1998·14 cites·14 claims
- 1647US7437929B2Liquid level detectorNIPPON SEIKI CO LTD·Filed 2004·Granted Oct 21, 2008·5 cites·3 claims
- 1737US8781029B2Frequency offset estimation apparatus, reception apparatus, frequency offset estimation method, and reception methodNAKAGAWA TADAO·Filed 2011·Granted Jul 15, 2014·0 cites·22 claims
- 1833US9178614B2Method for estimating amount of wavelength dispersion, wavelength dispersion compensation circuit, and receiving deviceYAMAZAKI ETSUSHI·Filed 2012·Granted Nov 3, 2015·0 cites·39 claims
- 1932US8971703B2Wavelength 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 →