Inventor · disambiguated record
Masahiko Igaki
Also filed as: IGAKI MASAHIKO
50 granted patents·2 pending applications·732 citations·filing 1986–2018
98Inventor score
Top patents by PatentIndex Score
52 records- 0196US6869158B2Liquid container with identifying means and method for detecting state of mount of liquid containerCANON KK·Filed 2003·Granted Mar 22, 2005·79 cites·23 claims
- 0294US6639207B2Optical rotary encoder and motor control apparatusCANON KK·Filed 2000·Granted Oct 28, 2003·62 cites·13 claims
- 0391US6803560B1Optical encoderCANON KK·Filed 2000·Granted Oct 12, 2004·44 cites·11 claims
- 0488US8487237B2Rotary encoder and method of assembling the sameWATANABE IKUO·Filed 2011·Granted Jul 16, 2013·12 cites·10 claims
- 0587US7348544B2Optical encoder with discontinuous optical gratingCANON KK·Filed 2005·Granted Mar 25, 2008·15 cites·6 claims
- 0686US6975408B2Reflection scale and displacement measurement apparatus using the sameCANON KK·Filed 2002·Granted Dec 13, 2005·28 cites·28 claims
- 0785US7358865B2Optical encoder and apparatus using optical encoderCANON KK·Filed 2006·Granted Apr 15, 2008·12 cites·6 claims
- 0885US7055926B2Liquid container, method for detecting liquid amount in liquid container, and liquid ejection recording apparatusCANON KK·Filed 2003·Granted Jun 6, 2006·26 cites·6 claims
- 0982US7132647B2Optical encoderCANON KK·Filed 2005·Granted Nov 7, 2006·9 cites·2 claims
- 1082US7045770B2Sensor using roof mirror/roof prism array scale, and apparatus equipped with the sensorCANON KK·Filed 2005·Granted May 16, 2006·9 cites·5 claims
- 1181US7026654B2Package for optical semiconductorCANON KK·Filed 2003·Granted Apr 11, 2006·31 cites·5 claims
- 1279US7022974B2Sensor using roof mirror/roof prism array scale, and apparatus equipped with the sensorCANON KK·Filed 2003·Granted Apr 4, 2006·16 cites·3 claims
- 1379US5359193ATalbot's interference type optical encoderCANON KK·Filed 1993·Granted Oct 25, 1994·34 cites·7 claims
- 1479US5327218AMethod and apparatus for measuring displacement by using a diffracted inverted image projected on a diffraction gratingCANON KK·Filed 1993·Granted Jul 5, 1994·33 cites·22 claims
- 1578US9329058B2Encoder that detects displacement of an object, and lens apparatus and camera having the sameCANON KK·Filed 2013·Granted May 3, 2016·4 cites·12 claims
- 1678US5483059ASignal processing method using comparator level adjustment in a displacement measuring deviceCANON KK·Filed 1994·Granted Jan 9, 1996·34 cites·28 claims
- 1777US5481106AEncoder with an optical scale and interference of zero and first order diffraction beamsCANON KK·Filed 1993·Granted Jan 2, 1996·32 cites·6 claims
- 1877US4820918AOptical encoder including transparent substrates having formed indicators thereinCANON KK·Filed 1986·Granted Apr 11, 1989·28 cites·27 claims
- 1975US7622698B2Detection headCANON KK·Filed 2007·Granted Nov 24, 2009·6 cites·7 claims
- 2075US7282699B2Optical encoder for improved detection of the absolute position of an origin pointCANON KK·Filed 2006·Granted Oct 16, 2007·7 cites·4 claims
- 2174US5062622AVibratory sheet feeder which uses phase adjustment to control the sheet feeding speedCANON KK·Filed 1990·Granted Nov 5, 1991·20 cites·17 claims
- 2273US7385179B2Optical encoder for measuring displacementCANON KK·Filed 2006·Granted Jun 10, 2008·7 cites·3 claims
- 2370US7184914B2Sensor signal processorCANON KK·Filed 2006·Granted Feb 27, 2007·4 cites·4 claims
- 2470US6891150B2Optical scale formed from mold having fixed and movable platensCANON KK·Filed 2001·Granted May 10, 2005·13 cites·5 claims
- 2569US8422025B2Optical encoder for obtaining displacement information of objectIGAKI MASAHIKO·Filed 2010·Granted Apr 16, 2013·3 cites·6 claims
- 2668US8527236B2Displacement detection apparatus and method of correcting error of scale used for displacement detection apparatusTAKAHAMA SHINICHIRO·Filed 2011·Granted Sep 3, 2013·2 cites·16 claims
- 2765US5124548AEncoder for detecting relative displacement having first and second scales and a light receiving deviceCANON KK·Filed 1991·Granted Jun 23, 1992·21 cites·22 claims
- 2864US5506681AMethod for detecting a reference position and displacement detector using the sameCANON KK·Filed 1994·Granted Apr 9, 1996·20 cites·8 claims
- 2963US7019281B2Rotation angle detection apparatus and rotary disk for sameCANON KK·Filed 2003·Granted Mar 28, 2006·7 cites·2 claims
- 3063US5323001ARotary encoder with scale member and interference of zero and first order diffraction beamCANON KK·Filed 1993·Granted Jun 21, 1994·20 cites·53 claims
- 3162US7019282B2Optical encoderCANON KK·Filed 2004·Granted Mar 28, 2006·8 cites·14 claims
- 3262US6901682B2Rotation angle detecting apparatus and its rotary discCANON KK·Filed 2002·Granted Jun 7, 2005·8 cites·10 claims
- 3361US8805022B2Velocity detection apparatus having two detectorsARIMITSU YASUMICHI·Filed 2010·Granted Aug 12, 2014·1 cites·4 claims
- 3458US6654128B2Displacement information detecting apparatusCANON KK·Filed 1998·Granted Nov 25, 2003·18 cites·12 claims
- 3557US7391011B2Optical encoder capable of detecting absolute positionCANON KK·Filed 2005·Granted Jun 24, 2008·2 cites·3 claims
- 3655US7732757B2Origin detection method for optical encoderCANON KK·Filed 2008·Granted Jun 8, 2010·1 cites·4 claims
- 3755US7425697B2Origin detection method for optical encoderCANON KK·Filed 2007·Granted Sep 16, 2008·1 cites·1 claims
- 3855US7332708B2Optical encoderCANON KK·Filed 2007·Granted Feb 19, 2008·1 cites·5 claims
- 3955US7326919B2Optical encoderCANON KK·Filed 2006·Granted Feb 5, 2008·1 cites·4 claims
- 4055US5302821AEncoder using a birefringent element and a system including the sameCANON KK·Filed 1992·Granted Apr 12, 1994·14 cites·16 claims
- 4155US2019017848A1Method of manufacturing rotary scale, rotary scale, rotary encoder, driving apparatus, image pickup apparatus and robot apparatusCANON PRECISION INC·Filed 2018·Application pending·0 cites
- 4254US5085423ASheet feeding deviceCANON KK·Filed 1990·Granted Feb 4, 1992·10 cites·12 claims
- 4353US7087888B2Electrical division circuit for an optical encoderCANON KK·Filed 2003·Granted Aug 8, 2006·5 cites·2 claims
- 4450US10094684B2Method of manufacturing rotary scale, rotary scale, rotary encoder, driving apparatus, image pickup apparatus and robot apparatusCANON PRECISION INC·Filed 2015·Granted Oct 9, 2018·0 cites·4 claims
- 4550US7217916B2Optical encoderCANON KK·Filed 2004·Granted May 15, 2007·3 cites·3 claims
- 4646US7122785B2Rotation angle detection apparatus and resin rotary disk for the sameCANON KK·Filed 2006·Granted Oct 17, 2006·0 cites·3 claims
- 4744US7099790B2Sensor signal processorCANON KK·Filed 2004·Granted Aug 29, 2006·1 cites·2 claims
- 4841US5211390ASheet feeding deviceCANON KK·Filed 1991·Granted May 18, 1993·5 cites·18 claims
- 4941US2011001985A1Measurement apparatus and optical apparatus with the sameCANON KK·Filed 2010·Application pending·0 cites
- 5040US5176376AVibration sheet feederCANON KK·Filed 1991·Granted Jan 5, 1993·8 cites·14 claims
Showing the top 50 of 52 patent records by PatentIndex Score.
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