Inventor · disambiguated record
Tomoyuki Akiyama
Also filed as: AKIYAMA TOMOYUKI
61 granted patents·6 pending applications·299 citations·filing 1982–2024
98Inventor score
Top patents by PatentIndex Score
67 records- 0196US9365046B2Ink circulation type inkjet printerRISO KAGAKU CORP·Filed 2015·Granted Jun 14, 2016·8 cites·8 claims
- 0295US9537289B1Modulated light sourceFUJITSU LTD·Filed 2016·Granted Jan 3, 2017·10 cites·7 claims
- 0394US11119278B2Optical demultiplexer, optical transport apparatus, and method of controlling optical demultiplexingFUJITSU LTD·Filed 2020·Granted Sep 14, 2021·4 cites·6 claims
- 0494US10488596B2Optical fiber mounted photonic integrated circuit deviceFUJITSU LTD·Filed 2017·Granted Nov 26, 2019·14 cites·11 claims
- 0594US9272524B1Ink circulation type inkjet printerRISO KAGAKU CORP·Filed 2015·Granted Mar 1, 2016·9 cites·2 claims
- 0692US9229249B2Optical semiconductor deviceAKIYAMA TOMOYUKI·Filed 2012·Granted Jan 5, 2016·10 cites·14 claims
- 0791US9182647B2Control method of optical elementFUJITSU LTD·Filed 2015·Granted Nov 10, 2015·9 cites·14 claims
- 0891US9016843B2Inkjet printerRISO KAGAKU CORP·Filed 2014·Granted Apr 28, 2015·6 cites·2 claims
- 0991US9002147B2Optical semiconductor deviceFUJITSU LTD·Filed 2014·Granted Apr 7, 2015·7 cites·10 claims
- 1088US11736201B2Optical transmitter for transmitting multilevel optical signalsFUJITSU LTD·Filed 2022·Granted Aug 22, 2023·2 cites·7 claims
- 1188US9513531B1Optical semiconductor element, method of controlling the same and method of manufacturing the sameFUJITSU LTD·Filed 2016·Granted Dec 6, 2016·3 cites·2 claims
- 1288US9219347B2Optical semiconductor deviceFUJITSU LTD·Filed 2014·Granted Dec 22, 2015·8 cites·14 claims
- 1388US9184865B2Optical switch, optical demodulator, and optical demodulation method having feedback control of temperature regulator based on optical detector outputAKIYAMA TOMOYUKI·Filed 2012·Granted Nov 10, 2015·6 cites·13 claims
- 1486US9261716B2Optical semiconductor device and optical semiconductor device control methodFUJITSU LTD·Filed 2014·Granted Feb 16, 2016·4 cites·12 claims
- 1584US8215754B2Detachable structure for ink cartridge, and control method for attaching/detaching ink cartridgeAKIYAMA TOMOYUKI·Filed 2009·Granted Jul 10, 2012·7 cites·10 claims
- 1682US9340031B2Ink circulation type inkjet printerRISO KAGAKU CORP·Filed 2015·Granted May 17, 2016·2 cites·3 claims
- 1781US10491321B2Optical transport apparatus, optical demultiplexer, and method of controlling optical demultiplexingFUJITSU LTD·Filed 2019·Granted Nov 26, 2019·3 cites·9 claims
- 1881US9239475B2Optical semiconductor element having ring modulatorsAKIYAMA TOMOYUKI·Filed 2012·Granted Jan 19, 2016·3 cites·6 claims
- 1981US7443574B2Optical transmission systemFUJITSU LTD·Filed 2006·Granted Oct 28, 2008·9 cites·9 claims
- 2080US6625337B2Wavelength-division multiplex optical signal processor and a method of regenerating a wavelength-division multiplexed optical signalFUJITSU LTD·Filed 2001·Granted Sep 23, 2003·17 cites·11 claims
- 2179US9513530B2Optical semiconductor element, method of controlling the same and method of manufacturing the sameFUJITSU LTD·Filed 2014·Granted Dec 6, 2016·2 cites·2 claims
- 2278US8197042B2Detachable structure for ink cartridgeAKIYAMA TOMOYUKI·Filed 2009·Granted Jun 12, 2012·5 cites·10 claims
- 2377US9436022B2Modulated light sourceFUJITSU LTD·Filed 2015·Granted Sep 6, 2016·2 cites·11 claims
- 2476US9061516B2Inkjet printerRISO KAGAKU CORP·Filed 2014·Granted Jun 23, 2015·2 cites·4 claims
- 2574US7808698B2Semiconductor deviceFUJITSU LTD·Filed 2005·Granted Oct 5, 2010·4 cites·16 claims
- 2670US7167301B2Semiconductor optical amplifier suitable for coarse WDM communications and light amplification methodFUJITSU LTD·Filed 2004·Granted Jan 23, 2007·8 cites·10 claims
- 2768US10547406B2Optical elementFUJITSU LTD·Filed 2017·Granted Jan 28, 2020·1 cites·11 claims
- 2868US10439729B2Optical device and optical apparatusFUJITSU LTD·Filed 2018·Granted Oct 8, 2019·1 cites·17 claims
- 2968US9505218B2Inkjet image forming apparatus and cleaning method for inkjet image forming apparatusRISO KAGAKU CORP·Filed 2015·Granted Nov 29, 2016·1 cites·6 claims
- 3068US5665133AProcess for production of pure transparent quartzTOSOH CORP·Filed 1995·Granted Sep 9, 1997·32 cites·5 claims
- 3166US11868026B2Optical AD converter and optical receiverFUJITSU LTD·Filed 2022·Granted Jan 9, 2024·0 cites·12 claims
- 3266US4481464AApparatus for measuring time variant device impedanceHEWLETT PACKARD CO·Filed 1982·Granted Nov 6, 1984·23 cites·6 claims
- 3363US7280272B2Bias control of SOA via switchesFUJITSU LTD·Filed 2005·Granted Oct 9, 2007·2 cites·15 claims
- 3462US6133178AHigh purity transparent silica glassTOSOH CORP·Filed 1998·Granted Oct 17, 2000·24 cites·2 claims
- 3561US12436339B2Optical transceiver, optical transceiver device using the same, and method of controlling light source wavelengthsFUJITSU LTD·Filed 2023·Granted Oct 7, 2025·0 cites·13 claims
- 3660US12126386B2Optical transmitter that transmits multi-level optical signalFUJITSU LTD·Filed 2022·Granted Oct 22, 2024·0 cites·6 claims
- 3760US6405563B1Opaque silica glass article having transparent portion and process for producing sameTOSOH CORP·Filed 2001·Granted Jun 18, 2002·8 cites·6 claims
- 3859US7375878B2Optical repeaterFUJITSU LTD·Filed 2003·Granted May 20, 2008·4 cites·13 claims
- 3959US2025007612A1Optical transmission deviceFUJITSU LTD·Filed 2024·Application pending·0 cites
- 4059US2025047390A1Optical transmitter, optical transceiver using optical transmitter, and wavelength control methodFUJITSU LTD·Filed 2024·Application pending·0 cites
- 4157US6925229B2Wavelength controllable optical device and light control methodFUJITSU LTD·Filed 2003·Granted Aug 2, 2005·4 cites·13 claims
- 4256US11630264B2Optical element and optical transmitterFUJITSU LTD·Filed 2021·Granted Apr 18, 2023·0 cites·14 claims
- 4356US5229336AMethod of producing oxynitride glassTOSOH CORP·Filed 1991·Granted Jul 20, 1993·17 cites·6 claims
- 4455US11791906B2Optical demultiplexing device and transmission deviceFUJITSU LTD·Filed 2022·Granted Oct 17, 2023·0 cites·13 claims
- 4554US7616377B2Optical repeaterFUJITSU LTD·Filed 2008·Granted Nov 10, 2009·0 cites·13 claims
- 4652US6992320B2Semiconductor optical device with quantum dots having internal tensile or compressive strainFUJITSU LTD·Filed 2003·Granted Jan 31, 2006·5 cites·37 claims
- 4751US10389083B2Modulated light sourceFUJITSU LTD·Filed 2018·Granted Aug 20, 2019·0 cites·11 claims
- 4850US12052052B2Optical demultiplexer and communication deviceFUJITSU LTD·Filed 2022·Granted Jul 30, 2024·0 cites·19 claims
- 4950US2007091419A1Semicondutor optical amplifier suitable for coarse WDM communications and light amplification methodFUJITSU LTD·Filed 2006·Application pending·0 cites
- 5049US8160116B2Semiconductor laser and method for manufacturing the sameAKIYAMA TOMOYUKI·Filed 2008·Granted Apr 17, 2012·0 cites·8 claims
Showing the top 50 of 67 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →