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Fujisawa, JP
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Patents Grants
last 30 patents
Information
Patent Grant
Optical disc apparatus and method
Patent number
6,643,231
Issue date
Nov 4, 2003
Hitachi, Ltd.
Kazuhiko Ono
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical disk apparatus
Patent number
6,552,970
Issue date
Apr 22, 2003
Hitachi, Ltd.
Kazuhiko Ono
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical disc apparatus accessing method and system therefor
Patent number
6,452,889
Issue date
Sep 17, 2002
Hitachi, Ltd.
Kazuhiko Ono
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical disc apparatus accessing method and system therefor
Patent number
6,317,403
Issue date
Nov 13, 2001
Hitachi, Ltd.
Kazuhiko Ono
G11 - INFORMATION STORAGE
Information
Patent Grant
Method and apparatus for automatically discriminating types of opti...
Patent number
6,262,957
Issue date
Jul 17, 2001
Hitachi, Ltd.
Shigeki Inoue
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical disc apparatus accessing method and system therefor
Patent number
6,108,291
Issue date
Aug 22, 2000
Hitachi, Ltd.
Kazuhiko Ono
G11 - INFORMATION STORAGE
Information
Patent Grant
Optical disc apparatus accessing method and system therefor
Patent number
6,002,655
Issue date
Dec 14, 1999
Hitachi, Ltd.
Kazuhiko Ono
G11 - INFORMATION STORAGE
Information
Patent Grant
Disk reproducing apparatus capable of increasing speed of access to...
Patent number
5,528,574
Issue date
Jun 18, 1996
Hitachi, Ltd.
Toshifumi Takeuchi
G11 - INFORMATION STORAGE
Information
Patent Grant
Disc playback apparatus
Patent number
4,682,314
Issue date
Jul 21, 1987
Hitachi, Ltd.
Harushige Nakagaki
G11 - INFORMATION STORAGE
Information
Patent Grant
Plural beam tracking servo including delay compensation
Patent number
4,581,728
Issue date
Apr 8, 1986
Hitachi, Ltd.
Masafumi Nakamura
G11 - INFORMATION STORAGE
Information
Patent Grant
Servo circuit for a signal reproducing apparatus
Patent number
4,580,255
Issue date
Apr 1, 1986
Hitachi, Ltd.
Shigeki Inoue
G11 - INFORMATION STORAGE
Information
Patent Grant
Digital player using a pulse width detector
Patent number
4,562,549
Issue date
Dec 31, 1985
Hitachi, Ltd.
Hiromichi Tanaka
G11 - INFORMATION STORAGE
Information
Patent Grant
Tracking servo control unit for an information reproducing apparatus
Patent number
4,539,665
Issue date
Sep 3, 1985
Hitachi, Ltd.
Yoshimi Iso
G11 - INFORMATION STORAGE
Information
Patent Grant
Playback speed control system
Patent number
4,532,561
Issue date
Jul 30, 1985
Hitachi, Ltd.
Hiroyuki Kimura
G11 - INFORMATION STORAGE
Information
Patent Grant
Protective device for power amplifier
Patent number
4,427,951
Issue date
Jan 24, 1984
Hitachi, Ltd.
Nobutaka Amada
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Supply voltage controlled stereophonic amplifier system
Patent number
4,409,559
Issue date
Oct 11, 1983
Hitachi, Ltd.
Nobutaka Amada
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Antenna tuning circuit for AM radio receiver
Patent number
4,403,347
Issue date
Sep 6, 1983
Hitachi, Ltd.
Yoshimi Iso
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Stereo demodulation system for an FM stereo broadcast receiver
Patent number
4,392,020
Issue date
Jul 5, 1983
Hitachi, Ltd.
Yoshimi Iso
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Automatic gain control system
Patent number
4,355,414
Issue date
Oct 19, 1982
Hitachi, Ltd.
Shigeki Inoue
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Audio frequency power amplifier circuit
Patent number
4,345,215
Issue date
Aug 17, 1982
Hitachi, Ltd.
Nobutaka Amada
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Stereo demodulator circuit
Patent number
4,334,125
Issue date
Jun 8, 1982
Hitachi, Ltd.
Shigeki Inoue
H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information
Patent Grant
Variable gain control circuit
Patent number
4,300,102
Issue date
Nov 10, 1981
Hitachi, Ltd.
Shigeki Inoue
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Remote-controlled receiver
Patent number
4,241,456
Issue date
Dec 23, 1980
Hitachi, Ltd.
Harushige Nakagaki
G08 - SIGNALLING
Information
Patent Grant
Audio frequency amplifier
Patent number
4,139,825
Issue date
Feb 13, 1979
Hitachi, Ltd.
Shigeki Inoue
G11 - INFORMATION STORAGE
Patents Applications
last 30 patents
Information
Patent Application
Optical disc apparatus and method
Publication number
20020181345
Publication date
Dec 5, 2002
Kazuhiko Ono
G11 - INFORMATION STORAGE
Information
Patent Application
OPTICAL DISK APPARATUS
Publication number
20020110054
Publication date
Aug 15, 2002
Kazuhiko Ono
G11 - INFORMATION STORAGE
Information
Patent Application
Optical disc apparatus accessing method and system therefor
Publication number
20020009025
Publication date
Jan 24, 2002
Kazuhiko Ono
G11 - INFORMATION STORAGE