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Toshio Koshihara
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Tokyo, JP
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last 30 patents
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Patent Grant
Method and apparatus for detecting defective portion on outer surfa...
Patent number
4,988,210
Issue date
Jan 29, 1991
NKK Corporation
Toshio Koshihara
G01 - MEASURING TESTING
Information
Patent Grant
Method for detecting thinned out portion on inner surface or outer...
Patent number
4,983,836
Issue date
Jan 8, 1991
NKK Corporation
Yuji Matoba
G01 - MEASURING TESTING
Information
Patent Grant
Method for detecting a state of substance existing in pipe
Patent number
4,886,370
Issue date
Dec 12, 1989
NKK Corporation
Toshio Koshihara
G01 - MEASURING TESTING
Information
Patent Grant
Method and apparatus for detecting defective portion on inner surfa...
Patent number
4,872,762
Issue date
Oct 10, 1989
NKK Corporation
Toshio Koshihara
G01 - MEASURING TESTING