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Rokurou Misawa
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Tokyo, JP
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last 30 patents
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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
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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