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Ken-Ichi Oyama
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Tokyo, JP
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last 30 patents
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Patent Grant
Method of forming a memory cell of a nonvolatile semiconductor memo...
Patent number
6,017,793
Issue date
Jan 25, 2000
NEC Corporation
Ken-Ichi Oyama
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Memory cell of a nonvolatile semiconductor device
Patent number
5,880,499
Issue date
Mar 9, 1999
NEC Corporation
Ken-Ichi Oyama
H01 - BASIC ELECTRIC ELEMENTS
Information
Patent Grant
Nonvolatile semiconductor memory device with dual insulation layers...
Patent number
5,637,897
Issue date
Jun 10, 1997
NEC Corporation
Ken-Ichi Oyama
G11 - INFORMATION STORAGE
Information
Patent Grant
Method for testing a nonvolatile semiconductor memory device
Patent number
5,636,168
Issue date
Jun 3, 1997
NEC Corporation
Ken-ichi Oyama
G11 - INFORMATION STORAGE
Information
Patent Grant
Nonvolatile semiconductor memory device equipped with means for sup...
Patent number
5,546,339
Issue date
Aug 13, 1996
NEC Corporation
Ken-ichi Oyama
G11 - INFORMATION STORAGE
Information
Patent Grant
Non-volatile semiconductor memory device and method for recovering...
Patent number
5,530,669
Issue date
Jun 25, 1996
NEC Corporation
Ken-ichi Oyama
G11 - INFORMATION STORAGE
Information
Patent Grant
Method of erasing data on non-volatile semi-conductor memory
Patent number
5,412,608
Issue date
May 2, 1995
NEC Corporation
Ken-ichi Oyama
G11 - INFORMATION STORAGE
Information
Patent Grant
Method of erasing data stored in flash type nonvolatile memory cell
Patent number
5,295,107
Issue date
Mar 15, 1994
NEC Corporation
Takeshi Okazawa
G11 - INFORMATION STORAGE