Kenji Yamamoto

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Patents Grantslast 30 patents

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Amorphous silicon photoelectric device
- Patent number 5,140,397
- Issue date Aug 18, 1992
- Ricoh Company, Ltd.
- Koichi Haga
- H01 - BASIC ELECTRIC ELEMENTS
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Amorphous silicon photosensor
- Patent number 5,053,844
- Issue date Oct 1, 1991
- Ricoh Company, Ltd.
- Akishige Murakami
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Image sensor with multilayered amorphous silicon contact
- Patent number 5,043,784
- Issue date Aug 27, 1991
- Ricoh Company, Ltd.
- Kenji Yamamoto
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Contact type image sensor
- Patent number 5,017,987
- Issue date May 21, 1991
- Ricoh Company, Ltd.
- Takeshi Nanjoh
- H01 - BASIC ELECTRIC ELEMENTS
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Amorphous silicon photosensor with oxygen doped layer
- Patent number 4,969,025
- Issue date Nov 6, 1990
- Ricoh Company, Ltd.
- Kenji Yamamoto
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Contact type image sensor
- Patent number 4,943,839
- Issue date Jul 24, 1990
- Ricoh Company, Ltd.
- Masafumi Kumano
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Contact type image sensor
- Patent number 4,874,957
- Issue date Oct 17, 1989
- Ricoh Company, Ltd.
- Saburo Sasaki
- H04 - ELECTRIC COMMUNICATION TECHNIQUE