P

Inventor

NISHIWAKI SEIJI

JP102 patents
⚠️ This page may combine multiple inventors who share the name “NISHIWAKI SEIJI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD

27 patents
US5343038AAug 30, 1994

Scanning laser microscope with photo coupling and detecting unit

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD81 citations96
US5200939AApr 6, 1993

Optical head apparatus including a waveguide layer with concentric or spiral periodic structure

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD73 citations95
US6459664B1Oct 1, 2002

Optical disc tilt control apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD31 citations93
US6327238B1Dec 4, 2001

Optical disk device

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD20 citations93
US6307827B1Oct 23, 2001

Optical device and information recording and reproducing device

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD29 citations93
US5307184AApr 26, 1994

Exposure apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD37 citations93
US5181265AJan 19, 1993

Optical coupling apparatus for introducing and coupling an incident light into a wave guide

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD25 citations93
US6618343B1Sep 9, 2003

Optical information processor and optical element

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD20 citations92
US6496453B2Dec 17, 2002

Optical pickup

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD33 citations92
US5193130AMar 9, 1993

Light deflecting device

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD23 citations92
US7239588B2Jul 3, 2007

Method and apparatus for detecting foreign body on object surface, and optical disk apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD11 citations84
US7157690B2Jan 2, 2007

Imaging device with triangular photodetector array for use in imaging

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD14 citations84
US5892741AApr 6, 1999

Information recording medium and tracking error signal detection apparatus and magnetic recording apparatus and method of adjusting the magnetic recording apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD18 citations84
US4991919AFeb 12, 1991

Optical head apparatus including concentric, periodic grating in a waveguide

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD19 citations81
US7126904B2Oct 24, 2006

Optical disk device

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD7 citations74
US6594042B2Jul 15, 2003

Optical element, optical pickup, information recording and reproducing method, and polarizing hologram

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD11 citations74
US6567372B2May 20, 2003

Optical disk and optical disk apparatus with tracks and grooves

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD10 citations74
US6009054ADec 28, 1999

Information recording medium and tracking error signal detection apparatus and magnetic recording apparatus and method of adjusting the magnetic recording apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD8 citations74
US5745221AApr 28, 1998

Exposure equipment

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD10 citations74
US5684900ANov 4, 1997

Wavelength locking device, beam collimating device, and optical disk apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD15 citations74
US5159650AOct 27, 1992

Optical disk apparatus for recording and reproducing ultra-high density signals

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD11 citations74
US5142394AAug 25, 1992

Twisted nematic polarizing element with a concentric circle orientation surface and optical head device incorporating the same

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD7 citations74
US6888787B2May 3, 2005

Optical information processor and optical element

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD4 citations73
US6704254B1Mar 9, 2004

Optical disk device, control method of optical system, medium, and information aggregate

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD9 citations73
US6674709B1Jan 6, 2004

Optical head apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD12 citations73
US5495462AFeb 27, 1996

Light beam splitting apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD14 citations71
US7443440B2Oct 28, 2008

Color separator and imager

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD5 citations63

PANASONIC CORP

11 patents

NISHIWAKI SEIJI

5 patents

PANASONIC IP MAN CO LTD

3 patents

HIRAMOTO MASAO

1 patent

WAKABAYASHI SHIN-ICHI

1 patent

NAGASHIMA MICHIYOSHI

1 patent

MATSUZAKI JYUNPEI

1 patent

Showing the top 50 of 102 patents by PatentIndex Score.