Membership
Tour
Register
Log in
Yoshihisa Koyama
Follow
Person
Mitaka, JP
People
Overview
Industries
Organizations
People
Information
Impact
Patents Grants
last 30 patents
Information
Patent Grant
Semiconductor memory device with improved substrate arrangement to...
Patent number
5,805,513
Issue date
Sep 8, 1998
Hitachi, Ltd.
Yasushi Takahashi
G11 - INFORMATION STORAGE
Information
Patent Grant
Semiconductor memory system
Patent number
5,598,373
Issue date
Jan 28, 1997
Hitachi, Ltd.
Shoji Wada
G11 - INFORMATION STORAGE
Information
Patent Grant
Semiconductor integrated circuit device
Patent number
5,440,521
Issue date
Aug 8, 1995
Hitachi, Ltd.
Manabu Tsunozaki
G11 - INFORMATION STORAGE
Information
Patent Grant
Semiconductor memory device with improved substrate arrangement to...
Patent number
5,426,613
Issue date
Jun 20, 1995
Hitachi, Ltd.
Yasushi Takahashi
G11 - INFORMATION STORAGE
Information
Patent Grant
Semiconductor memory device with improved substrate arrangement to...
Patent number
5,217,917
Issue date
Jun 8, 1993
Hitachi, Ltd.
Yasushi Takahashi
G11 - INFORMATION STORAGE
Information
Patent Grant
Semiconductor integrated circuit device
Patent number
5,151,772
Issue date
Sep 29, 1992
Hitachi, Ltd.
Yasushi Takahashi
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Semiconductor integrated circuit device having a carrier trapping t...
Patent number
4,752,819
Issue date
Jun 21, 1988
Hitachi Ltd.
Yoshihisa Koyama
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Semiconductor integrated circuit device having a carrier trapping t...
Patent number
4,658,283
Issue date
Apr 14, 1987
Hitachi, Ltd.
Yoshihisa Koyama
H01 - BASIC ELECTRIC ELEMENTS