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Koichiro Okumura
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Tokyo, JP
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last 30 patents
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Patent Grant
SOI-type semiconductor device with variable threshold voltages
Patent number
5,892,260
Issue date
Apr 6, 1999
NEC Corporation
Koichiro Okumura
G05 - CONTROLLING REGULATING
Information
Patent Grant
SOI-type semiconductor device with variable threshold voltages
Patent number
5,814,899
Issue date
Sep 29, 1998
NEC Corporation
Koichiro Okumura
G05 - CONTROLLING REGULATING
Information
Patent Grant
Silicon on insulator type semiconductor device
Patent number
5,760,444
Issue date
Jun 2, 1998
NEC Corporation
Koichiro Okumura
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Driver/receiver circuit including receiver circuit with p-channel M...
Patent number
5,680,069
Issue date
Oct 21, 1997
NEC Corporation
Koichiro Okumura
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Semiconductor integrated circuits with specific pitch multilevel in...
Patent number
5,631,478
Issue date
May 20, 1997
NEC Corporation
Koichiro Okumura
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Method of fabricating semiconductor device having refractory metal...
Patent number
5,593,923
Issue date
Jan 14, 1997
NEC Corporation
Tadahiko Horiuchi
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Driver/receiver circuit for reducing transmission delay
Patent number
5,543,744
Issue date
Aug 6, 1996
NEC Corporation
Koichiro Okumura
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Bi-CMOS out buffer circuit for CMOS logic
Patent number
5,247,214
Issue date
Sep 21, 1993
NEC Corporation
Koichiro Okumura
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
BiCMOS logic circuit
Patent number
5,159,214
Issue date
Oct 27, 1992
NEC Corporation
Koichiro Okumura
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
MOSFET-type driving circuit with capacitive bootstrapping for drivi...
Patent number
4,680,488
Issue date
Jul 14, 1987
NEC Corporation
Koichiro Okumura
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Semiconductor memory device including non-volatile transistor for s...
Patent number
4,635,229
Issue date
Jan 6, 1987
NEC Corporation
Koichiro Okumura
G11 - INFORMATION STORAGE
Information
Patent Grant
Field effect transistor output circuit operable by a reduced amount...
Patent number
4,587,446
Issue date
May 6, 1986
NEC Corporation
Koichiro Okumura
H03 - BASIC ELECTRONIC CIRCUITRY
Information
Patent Grant
Insulated gate field effect transistor provided with a protective d...
Patent number
4,481,521
Issue date
Nov 6, 1984
Nippon Electric Co., Ltd.
Koichiro Okumura
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Latch circuit
Patent number
4,295,061
Issue date
Oct 13, 1981
Nippon Electric Co., Ltd.
Saburo Tokoda
H03 - BASIC ELECTRONIC CIRCUITRY