P

Inventor

YOSHIDA YOSHIO

JP77 patents
⚠️ This page may combine multiple inventors who share the name “YOSHIDA YOSHIO”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

SHARP KK

37 patents
US5085496AFeb 4, 1992

Optical element and optical pickup device comprising it

SHARP KK242 citations99
US5465315ANov 7, 1995

Display apparatus having a plurality of display devices

SHARP KK76 citations96
US5446719AAug 29, 1995

Optical information reproducing apparatus

SHARP KK73 citations96
US5410622AApr 25, 1995

Optical integrated circuit having light detector

SHARP KK59 citations96
US6030540AFeb 29, 2000

Method for producing tapered waveguide

SHARP KK28 citations93
US5515354AMay 7, 1996

Optical pickup

SHARP KK40 citations93
US5408264AApr 18, 1995

Three-dimensional image display apparatus for optically synthesizing images formed on different surfaces on a display screen

SHARP KK27 citations93
US5283690AFeb 1, 1994

Optical diffraction grating element

SHARP KK31 citations93
US5128914AJul 7, 1992

Optical pickup apparatus utilizing a diffraction device

SHARP KK49 citations93
US6078707AJun 20, 2000

Waveguide-photodetector, method for producing the same, waveguide usable in the waveguide-photodetector, and method for producing the same

SHARP KK30 citations92
US5652816AJul 29, 1997

Optical coupler and method for producing the same

SHARP KK35 citations92
US5331621AJul 19, 1994

Optical pickup apparatus and a hologram element used for same

SHARP KK24 citations92
US5279924AJan 18, 1994

Manufacturing method of optical diffraction grating element with serrated gratings having uniformly etched grooves

SHARP KK47 citations92
US5253237AOct 12, 1993

Optical head device

SHARP KK23 citations92
US5251280AOct 5, 1993

Liquid crystal display apparatus

SHARP KK28 citations92
US5111449AMay 5, 1992

Optical pick-up device using diffraction grating element having two sub-regions

SHARP KK34 citations92
US4904856AFeb 27, 1990

Optical pickup device with diffraction sensing

SHARP KK45 citations92
US5509094AApr 16, 1996

Mode splitter and a magneto-optical disk pick-up device having the mode splitter

SHARP KK17 citations82
US5049732ASep 17, 1991

Optical pickup device with diffraction device

SHARP KK20 citations82
US6166372ADec 26, 2000

Polarization detection device and method for producing the same

SHARP KK14 citations74
US5946433AAug 31, 1999

Method for producing a photocoupler and a photocoupler produced by the same

SHARP KK8 citations74
US5726962AMar 10, 1998

Compact optical pickup device with beam splitter

SHARP KK14 citations74
US5576149ANov 19, 1996

Method for producing a tapered waveguide

SHARP KK11 citations74
US5440427AAug 8, 1995

Optical pick-up device having an optical diffraction grating element

SHARP KK5 citations74
US5428595AJun 27, 1995

Optical information recording and reproducing device

SHARP KK13 citations74
US5428472AJun 27, 1995

Optical scan device having an optical diffraction grating element

SHARP KK9 citations74
US5283772AFeb 1, 1994

Optical head

SHARP KK11 citations74
US5257131AOct 26, 1993

Polarization diffraction element and polarization detector employing the same

SHARP KK12 citations74
US5202869AApr 13, 1993

Optical head device including diffraction grating

SHARP KK7 citations74
US5173890ADec 22, 1992

Optical pickup device including diffraction grating

SHARP KK7 citations74
USRE35332ESep 24, 1996

Optical pickup device with diffraction device

SHARP KK8 citations73
US5428584AJun 27, 1995

Pickup device for a magneto-optical information recording system

SHARP KK10 citations73
US5410529AApr 25, 1995

Optical pickup apparatus

SHARP KK14 citations73
US5408450AApr 18, 1995

Optical pickup apparatus

SHARP KK19 citations73
US4985880AJan 15, 1991

Optical information recording and reproducing apparatus

SHARP KK8 citations73
US4812638AMar 14, 1989

Focusing error detector and optical data detecting device incorporating the focusing error detector

SHARP KK16 citations72
US6254284B1Jul 3, 2001

Optical pickup having optical waveguide device fixed on stem with wedge-shaped device fixing member interposed and method of manufacturing the same

SHARP KK8 citations71

DENSO CORP

4 patents

KAWASAKI HEAVY IND LTD

2 patents

MITSUI TOATSU CHEMICALS

2 patents

MITSUBISHI ELECTRIC CORP

1 patent

SANYO KOKUSAKU PULP CO

1 patent

HARUMOTO YOSHINOBU

1 patent

TANIZAKI TAKESHI

1 patent

SHINETSU POLYMER CO

1 patent

Showing the top 50 of 77 patents by PatentIndex Score.