Inventor
TOKUNAGA ICHIRO
JP28 patents
⚠️ This page may combine multiple inventors who share the name “TOKUNAGA ICHIRO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
ALPS ELECTRIC CO LTD
27 patentsUS4684210AAug 4, 1987
Light transmission device
ALPS ELECTRIC CO LTD58 citations95
US7265540B2Sep 4, 2007
Angle sensor having low waveform distortion
ALPS ELECTRIC CO LTD22 citations92
US6683544B2Jan 27, 2004
Seat position sensor
ALPS ELECTRIC CO LTD35 citations92
US6191577B1Feb 20, 2001
Magnetic sensor exhibiting large change in resistance at low external magnetic field
ALPS ELECTRIC CO LTD27 citations92
US4733071AMar 22, 1988
Optical encoder with variable fiber/phase angle adjustment
ALPS ELECTRIC CO LTD35 citations92
US6900713B2May 31, 2005
Magnetic switch capable of instantaneous switching of an output signal and magnetic sensor
ALPS ELECTRIC CO LTD22 citations91
US6640652B2Nov 4, 2003
Rotation angle sensor capable of accurately detecting rotation angle
ALPS ELECTRIC CO LTD35 citations91
US7521924B2Apr 21, 2009
Member position detection apparatus not affected by external magnetic field
ALPS ELECTRIC CO LTD11 citations84
US7405560B2Jul 29, 2008
GMR angle sensor for vehicles
ALPS ELECTRIC CO LTD17 citations84
US5081756AJan 21, 1992
Methods for assembling and adjusting a magnetic encoder device
ALPS ELECTRIC CO LTD18 citations82
US4705348ANov 10, 1987
Optical switch
ALPS ELECTRIC CO LTD22 citations81
US4650995AMar 17, 1987
Reflection type optical rotary encoder
ALPS ELECTRIC CO LTD21 citations81
US5117319AMay 26, 1992
Magnetic movement sensing device
ALPS ELECTRIC CO LTD13 citations74
US4659924AApr 21, 1987
Rotary encoder wherein phase difference is adjusted by the radial position of the sensor head
ALPS ELECTRIC CO LTD12 citations74
US7193411B2Mar 20, 2007
Angle sensor having low waveform distortion
ALPS ELECTRIC CO LTD9 citations73
US6539329B2Mar 25, 2003
Apparatus for detecting rotational angle by employing two or more detection signals based on rotational angle and rotational direction of rotating member
ALPS ELECTRIC CO LTD12 citations73
US4959574ASep 25, 1990
Precision Gap Magnetic Encode Device
ALPS ELECTRIC CO LTD10 citations73
US4845456AJul 4, 1989
Magnetic sensor
ALPS ELECTRIC CO LTD17 citations73
US4580871AApr 8, 1986
Rotary encoder
ALPS ELECTRIC CO LTD12 citations73
US4580130AApr 1, 1986
Rotary encoder
ALPS ELECTRIC CO LTD11 citations73
US6920684B2Jul 26, 2005
Assembling method for producing a magnetic sensor with high output accuracy
ALPS ELECTRIC CO LTD9 citations72
US5035960AJul 30, 1991
Magnetic recording medium for magnetic encoder
ALPS ELECTRIC CO LTD8 citations67
US7876091B2Jan 25, 2011
Magnetic encoder
ALPS ELECTRIC CO LTD2 citations63
US4634862AJan 6, 1987
Method of fabricating rotor of optical rotary encoder
ALPS ELECTRIC CO LTD2 citations62
US4617460AOct 14, 1986
Optical fiber sensor having shaped ends
ALPS ELECTRIC CO LTD4 citations62
US7231313B2Jun 12, 2007
Method of calculating compensation value for angle detecting sensor and angle detecting sensor using the method
ALPS ELECTRIC CO LTD3 citations61
US4606223AAug 19, 1986
Device for detecting rotating speed of thin shape motor
ALPS ELECTRIC CO LTD4 citations61