Inventor · disambiguated record
Yoshitaka Takasaki
Also filed as: ISHIZUKA KOHEI · KITA YASUHIRO · TAKASAKI YOSHITAKA
32 granted patents·1,013 citations·filing 1975–1996
98Inventor score
Files withHITACHI LTD32
Top patents by PatentIndex Score
32 records- 0198US5042027ACommunication network system and method of controlling a communication networkHITACHI LTD·Filed 1989·Granted Aug 20, 1991·369 cites·21 claims
- 0289US4459698AVariable equalizerHITACHI LTD·Filed 1982·Granted Jul 10, 1984·79 cites·13 claims
- 0387US4187479AVariable equalizerHITACHI LTD·Filed 1977·Granted Feb 5, 1980·55 cites·6 claims
- 0486US4604745AMethod of searching fault locations in digital transmission lineHITACHI LTD·Filed 1984·Granted Aug 5, 1986·59 cites·29 claims
- 0585US4123242AApparatus for producing optical fiberHITACHI LTD·Filed 1977·Granted Oct 31, 1978·32 cites·6 claims
- 0681US5121244AOptical subscriber network transmission systemHITACHI LTD·Filed 1989·Granted Jun 9, 1992·53 cites·12 claims
- 0775US5113524AQuantum state control apparatus, optical receiver and optical communication systemHITACHI LTD·Filed 1989·Granted May 12, 1992·40 cites·17 claims
- 0874US4504943ATime domain multiplexerHITACHI LTD·Filed 1982·Granted Mar 12, 1985·25 cites·7 claims
- 0971US4004253AVariable equalizerHITACHI LTD·Filed 1975·Granted Jan 18, 1977·23 cites·25 claims
- 1069US5140453AOptical receiving method utilizing polarization diversity and apparatus for carrying out the sameHITACHI LTD·Filed 1988·Granted Aug 18, 1992·32 cites·13 claims
- 1166US4410980ATime division multiplexing systemHITACHI LTD·Filed 1981·Granted Oct 18, 1983·24 cites·10 claims
- 1260US4723312ALight emitting diode driver circuitHITACHI LTD·Filed 1985·Granted Feb 2, 1988·24 cites·4 claims
- 1360US4320527ABit synchronizing system for pulse signal transmissionHITACHI LTD·Filed 1979·Granted Mar 16, 1982·14 cites·6 claims
- 1458US4967410AMethod of multiplexing digital signals and apparatus thereforHITACHI LTD·Filed 1989·Granted Oct 30, 1990·20 cites·13 claims
- 1556US4330856ADigital signal transmission system including means for converting asynchronous signals to the operating speed of a transmission lineHITACHI LTD·Filed 1980·Granted May 18, 1982·14 cites·13 claims
- 1654US4122417AVariable equalizerHITACHI LTD·Filed 1977·Granted Oct 24, 1978·12 cites·6 claims
- 1752US5121381AOptical switching apparatus for digital signal cross connection and method of interswitch optical transmission of digital signalsHITACHI LTD·Filed 1989·Granted Jun 9, 1992·13 cites·22 claims
- 1850US5175639AOptical subscriber network transmission systemHITACHI LTD·Filed 1990·Granted Dec 29, 1992·19 cites·12 claims
- 1948US5515368AInformation transmission system with variable transmission rateHITACHI LTD·Filed 1994·Granted May 7, 1996·16 cites·24 claims
- 2048US4080580AVariable equalizerHITACHI LTD·Filed 1976·Granted Mar 21, 1978·9 cites·6 claims
- 2147US5023604ACommunication systemHITACHI LTD·Filed 1988·Granted Jun 11, 1991·13 cites·4 claims
- 2245US5815502AInformation transmission system with variable transmission rateHITACHI LTD·Filed 1996·Granted Sep 29, 1998·16 cites·3 claims
- 2344US4970719ADigital signal multiplexing apparatusHITACHI LTD·Filed 1988·Granted Nov 13, 1990·9 cites·5 claims
- 2444US4503546APulse signal transmission systemHITACHI LTD·Filed 1983·Granted Mar 5, 1985·11 cites·31 claims
- 2543US4204176AVariable equalizerHITACHI LTD·Filed 1978·Granted May 20, 1980·7 cites·5 claims
- 2635US5430733ADigital transmission system for multiplexing and demultiplexing signalsHITACHI LTD·Filed 1989·Granted Jul 4, 1995·5 cites·64 claims
- 2734US4796281ADigital signal transmission systemHITACHI LTD·Filed 1986·Granted Jan 3, 1989·4 cites·7 claims
- 2833US5414739ATransmission system constituted of multistage reproduction nodesHITACHI LTD·Filed 1992·Granted May 9, 1995·6 cites·4 claims
- 2933US4262263AVariable equalizerHITACHI LTD·Filed 1979·Granted Apr 14, 1981·2 cites·3 claims
- 3031US5418405AInstallation path network for distribution areaHITACHI LTD·Filed 1992·Granted May 23, 1995·3 cites·11 claims
- 3131US5369517AOptical subscriber network transmission systemHITACHI LTD·Filed 1991·Granted Nov 29, 1994·3 cites·3 claims
- 3231US4097824AVariable equalizerHITACHI LTD·Filed 1977·Granted Jun 27, 1978·2 cites·4 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →