Inventor · disambiguated record
Ichiro Tokunaga
Also filed as: TOKUNAGA ICHIRO
28 granted patents·9 pending applications·465 citations·filing 1975–2018
97Inventor score
Top patents by PatentIndex Score
37 records- 0189US7405560B2GMR angle sensor for vehiclesALPS ELECTRIC CO LTD·Filed 2007·Granted Jul 29, 2008·17 cites·12 claims
- 0287US6640652B2Rotation angle sensor capable of accurately detecting rotation angleALPS ELECTRIC CO LTD·Filed 2002·Granted Nov 4, 2003·35 cites·4 claims
- 0384US4684210ALight transmission deviceALPS ELECTRIC CO LTD·Filed 1985·Granted Aug 4, 1987·58 cites·3 claims
- 0483US7265540B2Angle sensor having low waveform distortionALPS ELECTRIC CO LTD·Filed 2004·Granted Sep 4, 2007·22 cites·2 claims
- 0583US6683544B2Seat position sensorALPS ELECTRIC CO LTD·Filed 2002·Granted Jan 27, 2004·35 cites·7 claims
- 0683US4733071AOptical encoder with variable fiber/phase angle adjustmentALPS ELECTRIC CO LTD·Filed 1987·Granted Mar 22, 1988·35 cites·4 claims
- 0781US7193411B2Angle sensor having low waveform distortionALPS ELECTRIC CO LTD·Filed 2006·Granted Mar 20, 2007·9 cites·2 claims
- 0878US6900713B2Magnetic switch capable of instantaneous switching of an output signal and magnetic sensorALPS ELECTRIC CO LTD·Filed 2002·Granted May 31, 2005·22 cites·6 claims
- 0974US6191577B1Magnetic sensor exhibiting large change in resistance at low external magnetic fieldALPS ELECTRIC CO LTD·Filed 1998·Granted Feb 20, 2001·27 cites·12 claims
- 1070US4650995AReflection type optical rotary encoderALPS ELECTRIC CO LTD·Filed 1985·Granted Mar 17, 1987·21 cites·2 claims
- 1168US4705348AOptical switchALPS ELECTRIC CO LTD·Filed 1984·Granted Nov 10, 1987·22 cites·2 claims
- 1265US4845456AMagnetic sensorALPS ELECTRIC CO LTD·Filed 1988·Granted Jul 4, 1989·17 cites·1 claims
- 1363US5081756AMethods for assembling and adjusting a magnetic encoder deviceALPS ELECTRIC CO LTD·Filed 1990·Granted Jan 21, 1992·18 cites·7 claims
- 1461US3988827ASmall-size cutterOGURA CHUCK MFG·Filed 1975·Granted Nov 2, 1976·14 cites·1 claims
- 1560US6920684B2Assembling method for producing a magnetic sensor with high output accuracyALPS ELECTRIC CO LTD·Filed 2002·Granted Jul 26, 2005·9 cites·2 claims
- 1659US7231313B2Method of calculating compensation value for angle detecting sensor and angle detecting sensor using the methodALPS ELECTRIC CO LTD·Filed 2005·Granted Jun 12, 2007·3 cites·10 claims
- 1759US6539329B2Apparatus for detecting rotational angle by employing two or more detection signals based on rotational angle and rotational direction of rotating memberALPS ELECTRIC CO LTD·Filed 2001·Granted Mar 25, 2003·12 cites·4 claims
- 1859US4580871ARotary encoderALPS ELECTRIC CO LTD·Filed 1984·Granted Apr 8, 1986·12 cites·5 claims
- 1958US5117319AMagnetic movement sensing deviceALPS ELECTRIC CO LTD·Filed 1989·Granted May 26, 1992·13 cites·9 claims
- 2057US7876091B2Magnetic encoderALPS ELECTRIC CO LTD·Filed 2008·Granted Jan 25, 2011·2 cites·3 claims
- 2156US4659924ARotary encoder wherein phase difference is adjusted by the radial position of the sensor headALPS ELECTRIC CO LTD·Filed 1985·Granted Apr 21, 1987·12 cites·6 claims
- 2255US4580130ARotary encoderALPS ELECTRIC CO LTD·Filed 1984·Granted Apr 1, 1986·11 cites·2 claims
- 2352US7521924B2Member position detection apparatus not affected by external magnetic fieldALPS ELECTRIC CO LTD·Filed 2004·Granted Apr 21, 2009·11 cites·7 claims
- 2451US4959574APrecision Gap Magnetic Encode DeviceALPS ELECTRIC CO LTD·Filed 1989·Granted Sep 25, 1990·10 cites·10 claims
- 2547US2008211490A1Magnetic detector and method for making the sameKURATA KOJI·Filed 2007·Application pending·0 cites
- 2646US2008054894A1Magnetic detection device having element provided with multi-layered protection layer and a method of manufacturing the sameALPS ELECTRIC CO LTD·Filed 2007·Application pending·0 cites
- 2743US2010060268A1Angle sensorALPS ELECTRIC CO LTD·Filed 2009·Application pending·0 cites
- 2842US2009262466A1Magnetic sensor and magnetic encoder using sameALPS ELECTRIC CO LTD·Filed 2009·Application pending·0 cites
- 2942US2009251830A1Magnetic detectorALPS ELECTRIC CO LTD·Filed 2009·Application pending·0 cites
- 3040US2011133728A1Angle sensorALPS ELECTRIC CO LTD·Filed 2011·Application pending·0 cites
- 3139US2015022189A1Position detection deviceALPS ELECTRIC CO LTD·Filed 2014·Application pending·0 cites
- 3237US4617460AOptical fiber sensor having shaped endsALPS ELECTRIC CO LTD·Filed 1984·Granted Oct 14, 1986·4 cites·4 claims
- 3336US5035960AMagnetic recording medium for magnetic encoderALPS ELECTRIC CO LTD·Filed 1988·Granted Jul 30, 1991·8 cites·5 claims
- 3435US2018216925A1Position detection deviceALPS ELECTRIC CO LTD·Filed 2018·Application pending·0 cites
- 3534US4634862AMethod of fabricating rotor of optical rotary encoderALPS ELECTRIC CO LTD·Filed 1984·Granted Jan 6, 1987·2 cites·3 claims
- 3634US4606223ADevice for detecting rotating speed of thin shape motorALPS ELECTRIC CO LTD·Filed 1984·Granted Aug 19, 1986·4 cites·6 claims
- 3732US2016341802A1Magnetic sensorALPS ELECTRIC CO LTD·Filed 2016·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →