Hirofumi Ogawa

Person

Hachioji, JP

People

Patents Grantslast 30 patents

Information Patent Grant
Photoconductive imaging apparatus
- Patent number 5,233,265
- Issue date Aug 3, 1993
- Hitachi, Ltd.
- Yukio Takasaki
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Image pick-up tube and apparatus having the same
- Patent number 5,218,264
- Issue date Jun 8, 1993
- Hitachi, Ltd.
- Tadaaki Hirai
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Photoconductive device and method of operating the same
- Patent number 4,952,839
- Issue date Aug 28, 1990
- Hitachi, Ltd.
- Kenkichi Tanioka
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Photoconductive device and method of operating the same
- Patent number 4,888,521
- Issue date Dec 19, 1989
- Hitachi Ltd.
- Kenkichi Tanioka
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Method of making a photosensor
- Patent number 4,883,562
- Issue date Nov 28, 1989
- Hitachi, Ltd.
- Hirofumi Ogawa
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Image pickup tube
- Patent number 4,636,682
- Issue date Jan 13, 1987
- Hitachi, Ltd.
- Chushirou Kusano
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Photosensor having impurity concentration gradient
- Patent number 4,626,885
- Issue date Dec 2, 1986
- Hitachi, Ltd.
- Sachio Ishioka
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Image pick-up tube having collector and balance electrodes
- Patent number 4,609,846
- Issue date Sep 2, 1986
- Hitachi, Ltd.
- Chushirou Kusano
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Photoelectric conversion apparatus
- Patent number 4,556,817
- Issue date Dec 3, 1985
- Hitachi, Ltd.
- Chushirou Kusano
- H01 - BASIC ELECTRIC ELEMENTS

Hirofumi Ogawa

Person

Patents Grantslast 30 patents

Photoconductive imaging apparatus

Image pick-up tube and apparatus having the same

Photoconductive device and method of operating the same

Photoconductive device and method of operating the same

Method of making a photosensor

Image pickup tube

Photosensor having impurity concentration gradient

Image pick-up tube having collector and balance electrodes

Photoelectric conversion apparatus