P

Inventor

WATANABE KATSUYA

JP149 patents
⚠️ This page may combine multiple inventors who share the name “WATANABE KATSUYA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD

31 patents
US6298019B1Oct 2, 2001

Optical disk apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD39 citations96
US6285635B1Sep 4, 2001

Optical disk apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD61 citations96
US6011762AJan 4, 2000

Optical disk apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD64 citations96
US5831952ANov 3, 1998

Optical disk thickness discriminating apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD51 citations96
US7190650B2Mar 13, 2007

Optical disc drive for identifying and processing multiple optical disc types

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD23 citations93
US6493304B2Dec 10, 2002

Optical disk apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD18 citations93
US6028826AFeb 22, 2000

Optical disk apparatus performing correction of phase difference tracking error signal, adjustment of focus position and process of gain adjustment

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD36 citations93
US6628580B1Sep 30, 2003

Optical recording and reproducing apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD35 citations92
US6400663B1Jun 4, 2002

Optical disc apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD33 citations92
US6381201B1Apr 30, 2002

Optical disk apparatus with address polarity determination and confirmation

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD26 citations92
US5343454AAug 30, 1994

Tracking control apparatus for correcting tracking error signal according to approximate equation of a function of track address

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD36 citations92
US5199015AMar 30, 1993

Optical recording/reproducing device having means for adjusting servo loop gain and phase characteristics

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD21 citations92
US6181651B1Jan 30, 2001

Optical recording/reproducing apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD19 citations90
US6680887B2Jan 20, 2004

Optical disk apparatus and PLL circuit

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD27 citations88
US6295260B1Sep 25, 2001

Optical disk apparatus and computer with the optical disk apparatus built in

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD40 citations87
US5606536AFeb 25, 1997

Optical recording/reproducing apparatus with variable control

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD26 citations86
US7406007B2Jul 29, 2008

Optical disc apparatus and spherical aberration correction controlling apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD11 citations84
US7327642B2Feb 5, 2008

Method of moving a beam spot between information storage layers of an optical disk

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD18 citations84
US7054241B2May 30, 2006

Optical disc apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD18 citations84
US6714493B1Mar 30, 2004

Optical disk apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD13 citations84
US6498772B1Dec 24, 2002

Optical disc apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD19 citations84
US6044049AMar 28, 2000

Optical information apparatus employing two different tracking error signals based on regions on information medium

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD16 citations84
US6339566B1Jan 15, 2002

Optical recording/reproduction device

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD14 citations82
US6430119B1Aug 6, 2002

Optical disk drive apparatus capable of searching an optimum target position

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD20 citations80
US7379398B2May 27, 2008

Optical disc apparatus, an optical disc method, and a semiconductor integrated circuit capable of adjusting a focus position of a light beam and a spherical aberration

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD7 citations74
US7283435B2Oct 16, 2007

Optical disc device

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD8 citations74
US7218582B2May 15, 2007

Optical disc drive

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD7 citations74
US7158452B2Jan 2, 2007

Focus control for optical disk unit

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD8 citations74
US6870802B1Mar 22, 2005

Information reproduction apparatus with selective CLV and CAV control

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD10 citations74
US6567357B2May 20, 2003

Optical disk apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD12 citations74
US6434094B2Aug 13, 2002

Optical disk apparatus

MATSUSHITA ELECTRIC INDUSTRIAL CO LTD8 citations74

HITACHI LTD

9 patents

NIKON CORP

3 patents

SUMITOMO CHEMICAL CO

3 patents

KYOWA HAKKO KOGYO CO LTD KABUS

1 patent

PANASONIC CORP

1 patent

HITACHI GLOBAL STORAGE TECH

1 patent

USHIO ELECTRIC INC

1 patent

Showing the top 50 of 149 patents by PatentIndex Score.