Inventor · disambiguated record
Yasuo Matsuda
Also filed as: MAEDA TAKEO · MATSUDA YASUO · OKAWA TADASHI
68 granted patents·3 pending applications·1,543 citations·filing 1974–2013
99Inventor score
Top patents by PatentIndex Score
71 records- 0196US5297015APower supply control systemHITACHI LTD·Filed 1990·Granted Mar 22, 1994·170 cites·27 claims
- 0294US5008586ASolid state current sensing circuit and protection circuitHITACHI LTD·Filed 1989·Granted Apr 16, 1991·54 cites·7 claims
- 0391US5210479ADrive circuit for an insulated gate transistor having overcurrent detecting and adjusting circuitsHITACHI LTD·Filed 1989·Granted May 11, 1993·58 cites·27 claims
- 0487US4276589ATwelve-step current source inverterHITACHI LTD·Filed 1979·Granted Jun 30, 1981·34 cites·6 claims
- 0584US4231083APower conversion apparatusHITACHI LTD·Filed 1978·Granted Oct 28, 1980·30 cites·12 claims
- 0683US5073179AMethod for controlling fiber diameter during optical fiber drawing processSUMITOMO ELECTRIC INDUSTRIES·Filed 1990·Granted Dec 17, 1991·35 cites·2 claims
- 0783US4419615AMethod of controlling pulse width modulated inverter for use in induction motor driveHITACHI LTD·Filed 1981·Granted Dec 6, 1983·36 cites·3 claims
- 0882US4480299AMethod of controlling the output voltage of a pulse width modulation inverterHITACHI LTD·Filed 1982·Granted Oct 30, 1984·32 cites·6 claims
- 0981US4437051AMethod and apparatus for controlling induction motorHITACHI LTD·Filed 1982·Granted Mar 13, 1984·32 cites·4 claims
- 1078US4664474AOptical fiber and process for producing the sameSUMITOMO ELECTRIC INDUSTRIES·Filed 1984·Granted May 12, 1987·22 cites·5 claims
- 1177US5639512APlastic optical fiber preform, and process and apparatus for producing the sameSUMITOMO ELECTRIC INDUSTRIES·Filed 1994·Granted Jun 17, 1997·34 cites·17 claims
- 1277US5441215ASlitted winding wheel for optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 1994·Granted Aug 15, 1995·17 cites·8 claims
- 1377US4933830ASwitching power supplyHITACHI LTD·Filed 1989·Granted Jun 12, 1990·31 cites·10 claims
- 1476US5322228AMethod for screening optical fiber and apparatus for carrying out methodSUMITOMO ELECTRIC INDUSTRIES·Filed 1992·Granted Jun 21, 1994·34 cites·16 claims
- 1575US4599685AControl circuit for power converter apparatusHITACHI LTD·Filed 1985·Granted Jul 8, 1986·33 cites·7 claims
- 1674US5916495APlastic optical fiber preform, and process and apparatus for producing the sameSUMITOMO ELECTRIC INDUSTRIES·Filed 1997·Granted Jun 29, 1999·24 cites·13 claims
- 1773US5115386ACircuit for controlling an electric power supply apparatus, a method therefor and an uninterruptible power supplyHITACHI LTD·Filed 1990·Granted May 19, 1992·48 cites·20 claims
- 1873US4611158AMethod and apparatus for controlling PWM inverterHITACHI LTD·Filed 1984·Granted Sep 9, 1986·21 cites·19 claims
- 1972US8854820B2Power moduleYAMAMOTO SHINGO·Filed 2010·Granted Oct 7, 2014·5 cites·3 claims
- 2072US4179727AControl device for a pulse-width modulated inverterHITACHI LTD·Filed 1977·Granted Dec 18, 1979·17 cites·6 claims
- 2172US4012679AMethod and apparatus for controlling the operation of synchronous motorHITACHI LTD·Filed 1975·Granted Mar 15, 1977·18 cites·6 claims
- 2271US6850027B2Stepping motor driverJAPAN SERVO·Filed 2003·Granted Feb 1, 2005·19 cites·17 claims
- 2371US4866589AVoltage resonance type switching power source apparatusHITACHI LTD·Filed 1988·Granted Sep 12, 1989·28 cites·24 claims
- 2471US4384248AMethod and apparatus for detecting shortcircuit in arm of GTO inverterHITACHI LTD·Filed 1980·Granted May 17, 1983·25 cites·6 claims
- 2571US4099108AVariable speed control apparatus for induction motorHITACHI LTD·Filed 1976·Granted Jul 4, 1978·17 cites·8 claims
- 2670US6173102B1Coated optical fiber and its manufacturing methodSUMITOMO ELECTRIC INDUSTRIES·Filed 1998·Granted Jan 9, 2001·31 cites·9 claims
- 2770US5432873AOptical switchSUMITOMO ELECTRIC INDUSTRIES·Filed 1992·Granted Jul 11, 1995·33 cites·8 claims
- 2870US3997825AMethod and apparatus for controlling synchronous motorHITACHI LTD·Filed 1974·Granted Dec 14, 1976·17 cites·9 claims
- 2969US5851666APlastic optical fiber preform, and process and apparatus for producing the sameSUMITOMO ELECTRIC INDUSTRIES·Filed 1997·Granted Dec 22, 1998·23 cites·19 claims
- 3069US4581693AApparatus for repeatedly applying short-circuit pulses to a current type inverter for output current controlHITACHI LTD·Filed 1984·Granted Apr 8, 1986·18 cites·9 claims
- 3168US7779532B2Manufacturing method of hybrid permanent magnet type electric rotating machineNIDEC SERVO CORP·Filed 2007·Granted Aug 24, 2010·6 cites·8 claims
- 3268US7068001B2Motor control systemJAPAN SERVO·Filed 2005·Granted Jun 27, 2006·7 cites·7 claims
- 3367US7589440B2Stepping motorNIDEC SERVO CORP·Filed 2006·Granted Sep 15, 2009·5 cites·3 claims
- 3467US5614253APlastic optical fiber preform, and process and apparatus for producing the sameSUMITOMO ELECTRIC INDUSTRIES·Filed 1994·Granted Mar 25, 1997·22 cites·15 claims
- 3567US4890009AMonolithic integrated circuit deviceHITACHI LTD·Filed 1988·Granted Dec 26, 1989·25 cites·10 claims
- 3666US4420718AControl system for induction motor using inverter for AC power supplyHITACHI LTD·Filed 1981·Granted Dec 13, 1983·17 cites·8 claims
- 3765US4878163APulse width modulated inverter with high-to-low frequency output converterHITACHI LTD·Filed 1988·Granted Oct 31, 1989·23 cites·6 claims
- 3864US6546760B1Optical fiber drawing furnace with a zig zag heating elementSUMITOMO ELECTRIC INDUSTRIES·Filed 1996·Granted Apr 15, 2003·17 cites·9 claims
- 3964US4188663AProtective device of a current source inverterHITACHI LTD·Filed 1978·Granted Feb 12, 1980·14 cites·16 claims
- 4063US6078715AOptical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 1998·Granted Jun 20, 2000·26 cites·5 claims
- 4163US4549258AInverter device using gate turn-off thyristorsHITACHI LTD·Filed 1983·Granted Oct 22, 1985·15 cites·7 claims
- 4262US5274541AParallel circuit module including a diode and an IGBTHITACHI LTD·Filed 1990·Granted Dec 28, 1993·32 cites·1 claims
- 4362US5127361AResin coating device for optical fiberSUMITOMO ELECTRIC INDUSTRIES·Filed 1991·Granted Jul 7, 1992·21 cites·4 claims
- 4462US5091984AOptical switch for use with optical fibersSUMITOMO ELECTRIC INDUSTRIES·Filed 1990·Granted Feb 25, 1992·24 cites·20 claims
- 4562US5088017ADC-DC converter and a computer using the converterHITACHI LTD·Filed 1990·Granted Feb 11, 1992·41 cites·27 claims
- 4661US4749535AMethod and apparatus for forming profiled plastic products involving extrusion, roller shaping and cuttingMATSUDA YASUO·Filed 1986·Granted Jun 7, 1988·21 cites·11 claims
- 4758US5108200ACoupler-type optical switch and process for producing the sameSUMITOMO ELECTRIC INDUSTRIES·Filed 1990·Granted Apr 28, 1992·21 cites·4 claims
- 4854US4897593AReactive power compensator for electric power systemHITACHI LTD·Filed 1989·Granted Jan 30, 1990·23 cites·13 claims
- 4953US6181859B1Coated optical fiber and method of making the sameSUMITOMO ELECTRIC INDUSTRIES·Filed 1998·Granted Jan 30, 2001·14 cites·8 claims
- 5052US5891570APlastic optical fiber preform having a jacket layerSUMITOMO ELECTRIC INDUSTRIES·Filed 1997·Granted Apr 6, 1999·10 cites·10 claims
Showing the top 50 of 71 patent records by PatentIndex Score.
Join the waitlist — get patent alerts
Get an alert when Yasuo Matsuda 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 →