Masahiro Ojima

Person

Shakujii, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Dispersion compensator and optical transmission system using same
- Patent number 6,731,846
- Issue date May 4, 2004
- Hitachi, Ltd.
- Kazuhiko Hosomi
- B82 - NANO-TECHNOLOGY
Information Patent Grant
Optical switching device and optical switching method
- Patent number 6,463,191
- Issue date Oct 8, 2002
- Hitachi, Ltd.
- Hideaki Tsushima
- G02 - OPTICS
Information Patent Grant
Resin molded optical assembly
- Patent number 5,737,467
- Issue date Apr 7, 1998
- Hitachi, Ltd.
- Takeshi Kato
- G02 - OPTICS
Information Patent Grant
Magnetic head load/unload device, method and a magneto-optical disk...
- Patent number 5,644,554
- Issue date Jul 1, 1997
- Hitachi, Ltd.
- Kunio Harada
- G11 - INFORMATION STORAGE
Information Patent Grant
Magneto-optical recording media and mangeto-optical device using th...
- Patent number 5,462,811
- Issue date Oct 31, 1995
- Hitachi, Ltd.
- Harukazu Miyamoto
- G11 - INFORMATION STORAGE
Information Patent Grant
Magneto-optical recording media and magneto-optical recording devic...
- Patent number 5,434,844
- Issue date Jul 18, 1995
- Hitachi, Ltd.
- Harukazu Miyamoto
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical information recording/reproducing system including novel tr...
- Patent number 5,408,452
- Issue date Apr 18, 1995
- Hitachi Maxell, Ltd.
- Akito Sakemoto
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical recording method
- Patent number 5,293,567
- Issue date Mar 8, 1994
- Hitachi, Ltd.
- Motoyasu Terao
- G11 - INFORMATION STORAGE
Information Patent Grant
Magneto-optical recording and reproducing method, magneto-optical m...
- Patent number 5,270,987
- Issue date Dec 14, 1993
- Hitachi, Ltd.
- Toshimitsu Kaku
- G11 - INFORMATION STORAGE
Information Patent Grant
Magneto-optical recording media and overwrite recording method usin...
- Patent number 5,263,015
- Issue date Nov 16, 1993
- Hitachi, Ltd.
- Toshio Niihara
- G11 - INFORMATION STORAGE
Information Patent Grant
Magneto-optical recording apparatus having a magnetic slider with i...
- Patent number 5,253,232
- Issue date Oct 12, 1993
- Hitachi, Ltd.
- Kyo Akagi
- G11 - INFORMATION STORAGE
Information Patent Grant
Magneto-optical head employing optical fiber connected stationary a...
- Patent number 5,245,491
- Issue date Sep 14, 1993
- Hitachi Cable Limited
- Makoto Horie
- G11 - INFORMATION STORAGE
Information Patent Grant
Stack type optical disc apparatus, sealed and separate type optical...
- Patent number 5,235,591
- Issue date Aug 10, 1993
- Hitachi, Ltd.
- Shigeru Nakamura
- G11 - INFORMATION STORAGE
Information Patent Grant
Semiconductor laser device having a transparent waveguide and a lar...
- Patent number 5,208,827
- Issue date May 4, 1993
- Hitachi, Ltd.
- Misuzu Sagawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Magneto-optical disc memory apparatus including a header signal and...
- Patent number 5,161,135
- Issue date Nov 3, 1992
- Hitachi, Ltd.
- Atsushi Saito
- G11 - INFORMATION STORAGE
Information Patent Grant
Overwritable magneto-optic recording and reproducing apparatus
- Patent number 5,043,960
- Issue date Aug 27, 1991
- Hitachi, Ltd.
- Takeshi Nakao
- G11 - INFORMATION STORAGE
Information Patent Grant
Magneto-optical memory apparatus having a floating magnetic head
- Patent number 5,020,041
- Issue date May 28, 1991
- Hitachi, Ltd.
- Takeshi Nakao
- G11 - INFORMATION STORAGE
Information Patent Grant
Two-laser collimated beam optical head with monitor
- Patent number 5,016,234
- Issue date May 14, 1991
- Hitachi, Ltd.
- Shigeru Nakamura
- G11 - INFORMATION STORAGE
Information Patent Grant
Record carrier for a magneto-optical disc memory having guide groov...
- Patent number 4,985,881
- Issue date Jan 15, 1991
- Hitachi, Ltd.
- Atsushi Saito
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical information phase change recording medium having double pro...
- Patent number 4,984,231
- Issue date Jan 8, 1991
- Hitachi, Ltd.
- Hiroshi Yasuoka
- G11 - INFORMATION STORAGE
Information Patent Grant
Magneto-optical recorder with compensation for variation in applied...
- Patent number 4,982,389
- Issue date Jan 1, 1991
- Hitachi, Ltd.
- Takeshi Nakao
- G11 - INFORMATION STORAGE
Information Patent Grant
Information recording medium and apparatus using reversible phase c...
- Patent number 4,982,396
- Issue date Jan 1, 1991
- Hitachi, Ltd.
- Hiroshi Yasuoka
- G11 - INFORMATION STORAGE
Information Patent Grant
Wavelength multiplexing optical recording apparatus
- Patent number 4,908,813
- Issue date Mar 13, 1990
- Hitachi, Ltd.
- Masahiro Ojima
- G11 - INFORMATION STORAGE
Information Patent Grant
Semiconductor laser device
- Patent number 4,901,325
- Issue date Feb 13, 1990
- Hitachi, Ltd.
- Takeshi Kato
- G11 - INFORMATION STORAGE
Information Patent Grant
Optical information recording apparatus
- Patent number 4,894,816
- Issue date Jan 16, 1990
- Hitachi, Ltd.
- Hirofumi Sukeda
- G11 - INFORMATION STORAGE
Information Patent Grant
Method for erasing recording in a PHB memory
- Patent number 4,855,951
- Issue date Aug 8, 1989
- Hitachi, Ltd.
- Yasushi Tomioka
- G11 - INFORMATION STORAGE
Information Patent Grant
Semiconductor laser array device
- Patent number 4,811,348
- Issue date Mar 7, 1989
- Hitachi, Ltd.
- Akira Arimoto
- G06 - COMPUTING CALCULATING COUNTING
Information Patent Grant
Information recording apparatus for recording/reproducing informati...
- Patent number 4,806,952
- Issue date Feb 21, 1989
- Hitachi, Ltd.
- Tetsuya Nishida
- G11 - INFORMATION STORAGE
Information Patent Grant
Method and apparatus for thermo magnetic recording/erasing informat...
- Patent number 4,712,203
- Issue date Dec 8, 1987
- Hitachi, Ltd.
- Atsushi Saito
- G11 - INFORMATION STORAGE
Information Patent Grant
Method of and apparatus for driving semiconductor laser
- Patent number 4,712,218
- Issue date Dec 8, 1987
- Hitachi, Ltd.
- Nobutaka Ohnuki
- G11 - INFORMATION STORAGE

Patents Applicationslast 30 patents

Information Patent Application
Seamless handover method for mobile IPv6 home agent
- Publication number 20050047372
- Publication date Mar 3, 2005
- Masashi Yano
- H04 - ELECTRIC COMMUNICATION TECHNIQUE
Information Patent Application
Dispersion compensator and optical transmission system using same
- Publication number 20020172456
- Publication date Nov 21, 2002
- Kazuhiko Hosomi
- B82 - NANO-TECHNOLOGY

Masahiro Ojima

Person

Patents Grantslast 30 patents

Dispersion compensator and optical transmission system using same

Optical switching device and optical switching method

Resin molded optical assembly

Magnetic head load/unload device, method and a magneto-optical disk...

Magneto-optical recording media and mangeto-optical device using th...

Magneto-optical recording media and magneto-optical recording devic...

Optical information recording/reproducing system including novel tr...

Optical recording method

Magneto-optical recording and reproducing method, magneto-optical m...

Magneto-optical recording media and overwrite recording method usin...

Magneto-optical recording apparatus having a magnetic slider with i...

Magneto-optical head employing optical fiber connected stationary a...

Stack type optical disc apparatus, sealed and separate type optical...

Semiconductor laser device having a transparent waveguide and a lar...

Magneto-optical disc memory apparatus including a header signal and...

Overwritable magneto-optic recording and reproducing apparatus

Magneto-optical memory apparatus having a floating magnetic head

Two-laser collimated beam optical head with monitor

Record carrier for a magneto-optical disc memory having guide groov...

Optical information phase change recording medium having double pro...

Magneto-optical recorder with compensation for variation in applied...

Information recording medium and apparatus using reversible phase c...

Wavelength multiplexing optical recording apparatus

Semiconductor laser device

Optical information recording apparatus

Method for erasing recording in a PHB memory

Semiconductor laser array device

Information recording apparatus for recording/reproducing informati...

Method and apparatus for thermo magnetic recording/erasing informat...

Method of and apparatus for driving semiconductor laser

Patents Applicationslast 30 patents

Seamless handover method for mobile IPv6 home agent

Dispersion compensator and optical transmission system using same