Fumihiko Yokogawa

Person

Tsurugashima, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Digital data transmitting method
- Patent number RE40312
- Issue date May 13, 2008
- Pioneer Electronic Corporation
- Tadashi Kojima
- 375 - Pulse or digital communications
Information Patent Grant
High density optical recording medium and method for reproducing th...
- Patent number 7,190,664
- Issue date Mar 13, 2007
- Pioneer Corporation
- Takuma Yanagisawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Video disc having an aspect ratio information and video disc player...
- Patent number 6,968,121
- Issue date Nov 22, 2005
- Pioneer Electronic Corporation
- Fumihiko Yokogawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Video disc having an aspect ratio information and video disc player...
- Patent number 6,463,210
- Issue date Oct 8, 2002
- Pioneer Corporation
- Fumihiko Yokogawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Grant
Digital data transmitting method
- Patent number 5,987,066
- Issue date Nov 16, 1999
- Kabushiki Kaisha Toshiba
- Tadashi Kojima
- G11 - INFORMATION STORAGE
Information Patent Grant
Digital modulation apparatus, a digital modulation method, and a re...
- Patent number 5,917,857
- Issue date Jun 29, 1999
- Matsushita Electric Industrial Co., Ltd.
- Shin-ichi Tanaka
- G11 - INFORMATION STORAGE
Information Patent Grant
Constant angular velocity type optical disk, double density recordi...
- Patent number 5,914,920
- Issue date Jun 22, 1999
- Pioneer Electronic Corporation
- Fumihiko Yokogawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Spindle servo circuit in an apparatus for playing an optical disk h...
- Patent number 5,740,152
- Issue date Apr 14, 1998
- Pioneer Electronic Corporation
- Fumihiko Yokogawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disk, tracking error signal generating apparatus, and track...
- Patent number 5,646,932
- Issue date Jul 8, 1997
- Pioneer Electronic Corporation
- Hiroki Kuribayashi
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disk having synchronous marks and data marks to satisfy cer...
- Patent number 5,629,924
- Issue date May 13, 1997
- Pioneer Electronic Corporation
- Fumihiko Yokogawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disc with heat blocking bands between tracks
- Patent number 5,617,406
- Issue date Apr 1, 1997
- Pioneer Electronic Corporation
- Nobuaki Onagi
- G11 - INFORMATION STORAGE
Information Patent Grant
Multi-layered recording disk and recording/reproducing system using...
- Patent number 5,608,715
- Issue date Mar 4, 1997
- Pioneer Electronic Corporation
- Fumihiko Yokogawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disk of sampled servo type having synchronization a marks f...
- Patent number 5,600,626
- Issue date Feb 4, 1997
- Pioneer Electronic Corporation
- Fumihiko Yokogawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disc and system for generating a tracking error signal for...
- Patent number 5,583,846
- Issue date Dec 10, 1996
- Pioneer Electronic Corporation
- Fumihiko Yokogawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Tracking servo apparatus for use in an optical disk player
- Patent number 5,471,448
- Issue date Nov 28, 1995
- Pioneer Electronic Corporation
- Fumihiko Yokogawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Digital signal reproducing apparatus for reproducing digital signal...
- Patent number 5,440,532
- Issue date Aug 8, 1995
- Pioneer Electronic Corporation
- Fumihiko Yokogawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disk, tracking error signal generating apparatus, and track...
- Patent number 5,434,836
- Issue date Jul 18, 1995
- Pioneer Electronic Corporation
- Hiroki Kuribayashi
- G11 - INFORMATION STORAGE
Information Patent Grant
Non-linear reflectance optical information recording layer irradiat...
- Patent number 5,434,840
- Issue date Jul 18, 1995
- Pioneer Electronic Corporation
- Toshiharu Ezuka
- G11 - INFORMATION STORAGE
Information Patent Grant
Apparatus for playing optical recording medium with combination tra...
- Patent number 5,430,700
- Issue date Jul 4, 1995
- Pioneer Electronic Corporation
- Hiroki Kuribayashi
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical recording medium and apparatus for playing such a medium
- Patent number 5,376,422
- Issue date Dec 27, 1994
- Pioneer Electronic Corporation
- Hiroki Kuribayashi
- G11 - INFORMATION STORAGE
Information Patent Grant
Disc playing and recording apparatus having a pair of heads control...
- Patent number 5,280,462
- Issue date Jan 18, 1994
- Pioneer Electronic Corporation
- Fumihiko Yokogawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical recording medium
- Patent number 5,246,758
- Issue date Sep 21, 1993
- Pioneer Electronic Corporation
- Fumio Matsui
- G11 - INFORMATION STORAGE
Information Patent Grant
Duty factor control circuit with variable output pulse width function
- Patent number 5,163,036
- Issue date Nov 10, 1992
- Pioneer Electronic Corporation
- Fumihiko Yokogawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Spindle control device in optical disk recording/reproducing apparatus
- Patent number 5,124,808
- Issue date Jun 23, 1992
- Pioneer Electronic Corporation
- Fumihiko Yokogawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Spindle servo utilizing a vertical sync mark
- Patent number 5,121,219
- Issue date Jun 9, 1992
- Pioneer Electronic Corporation
- Fumihiko Yokogawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical recording apparatus
- Patent number 5,111,443
- Issue date May 5, 1992
- Pioneer Electronic Corporation
- Fumihiko Yokogawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Duty factor control circuit with variable output pulse width function
- Patent number 5,103,441
- Issue date Apr 7, 1992
- Pioneer Electronic Corporation
- Fumihiko Yokogawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Spindle control device in optical disk recording/reproducing apparatus
- Patent number 5,089,900
- Issue date Feb 18, 1992
- Pioneer Electric Corporation
- Fumihiko Yokogawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Clock signal generating circuit for a data storing and reproducing...
- Patent number 5,065,384
- Issue date Nov 12, 1991
- Pioneer Electronic Corporation
- Fumihiko Yokogawa
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical disc with pregrooves and recording method and apparatus usi...
- Patent number 5,051,836
- Issue date Sep 24, 1991
- Pioneer Electronic Corporation
- Fumihiko Yokogawa
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

Information Patent Application
Optical disk, copy preventive method, and recordable optical disk
- Publication number 20030086360
- Publication date May 8, 2003
- PIONEER CORPORATION
- Toshio Suzuki
- G11 - INFORMATION STORAGE
Information Patent Application
Video disc having an aspect ratio information and video disc player...
- Publication number 20020197057
- Publication date Dec 26, 2002
- Pioneer Electronic Corporation
- Fumihiko Yokogawa
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Optical disc having pits of desired taper angle
- Publication number 20020080713
- Publication date Jun 27, 2002
- PIONEER CORPORATION
- Takayuki Nomoto
- G11 - INFORMATION STORAGE

Fumihiko Yokogawa

Person

Patents Grantslast 30 patents

Digital data transmitting method

High density optical recording medium and method for reproducing th...

Video disc having an aspect ratio information and video disc player...

Video disc having an aspect ratio information and video disc player...

Digital data transmitting method

Digital modulation apparatus, a digital modulation method, and a re...

Constant angular velocity type optical disk, double density recordi...

Spindle servo circuit in an apparatus for playing an optical disk h...

Optical disk, tracking error signal generating apparatus, and track...

Optical disk having synchronous marks and data marks to satisfy cer...

Optical disc with heat blocking bands between tracks

Multi-layered recording disk and recording/reproducing system using...

Optical disk of sampled servo type having synchronization a marks f...

Optical disc and system for generating a tracking error signal for...

Tracking servo apparatus for use in an optical disk player

Digital signal reproducing apparatus for reproducing digital signal...

Optical disk, tracking error signal generating apparatus, and track...

Non-linear reflectance optical information recording layer irradiat...

Apparatus for playing optical recording medium with combination tra...

Optical recording medium and apparatus for playing such a medium

Disc playing and recording apparatus having a pair of heads control...

Optical recording medium

Duty factor control circuit with variable output pulse width function

Spindle control device in optical disk recording/reproducing apparatus

Spindle servo utilizing a vertical sync mark

Optical recording apparatus

Duty factor control circuit with variable output pulse width function

Spindle control device in optical disk recording/reproducing apparatus

Clock signal generating circuit for a data storing and reproducing...

Optical disc with pregrooves and recording method and apparatus usi...

Patents Applicationslast 30 patents

Optical disk, copy preventive method, and recordable optical disk

Video disc having an aspect ratio information and video disc player...

Optical disc having pits of desired taper angle