Motohisa Hirao

Person

Suginami, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Optical device diffraction gratings and a photomask for use in the...
- Patent number 5,340,637
- Issue date Aug 23, 1994
- Hitachi, Ltd.
- Makoto Okai
- G02 - OPTICS
Information Patent Grant
Semiconductor devices
- Patent number 4,905,057
- Issue date Feb 27, 1990
- Hitachi, Ltd.
- Akio Ohishi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Semiconductor laser devices
- Patent number 4,841,536
- Issue date Jun 20, 1989
- Hitachi, Ltd.
- Aiko Ohishi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Distributed-feedback semiconductor laser device
- Patent number 4,775,980
- Issue date Oct 4, 1988
- Hitachi, Ltd.
- Naoki Chinone
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Distributed-feedback semiconductor laser device
- Patent number 4,665,528
- Issue date May 12, 1987
- Hitachi, Ltd.
- Naoki Chinone
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Semiconductor laser device
- Patent number 4,426,700
- Issue date Jan 17, 1984
- Hitachi, Ltd.
- Motohisa Hirao
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Semiconductor laser device including an arrangement for preventing...
- Patent number 4,366,569
- Issue date Dec 28, 1982
- Hitachi, Ltd.
- Motohisa Hirao
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Semiconductor light emitting element
- Patent number 4,361,887
- Issue date Nov 30, 1982
- Hitachi, Ltd.
- Michiharu Nakamura
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Semiconductor laser device
- Patent number 4,288,757
- Issue date Sep 8, 1981
- Hitachi, Ltd.
- Takashi Kajimura
- H01 - BASIC ELECTRIC ELEMENTS

Motohisa Hirao

Person

Patents Grantslast 30 patents

Optical device diffraction gratings and a photomask for use in the...

Semiconductor devices

Semiconductor laser devices

Distributed-feedback semiconductor laser device

Distributed-feedback semiconductor laser device

Semiconductor laser device

Semiconductor laser device including an arrangement for preventing...

Semiconductor light emitting element

Semiconductor laser device