Phu-Ann Ngo

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Aulnoye Ayneries, FR

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Patents Grantslast 30 patents

Information Patent Grant
Method of assessing faults in metal tubes having internal helical ribs
- Patent number 5,230,247
- Issue date Jul 27, 1993
- Valtubes
- Phu-Ann Ngo
- G01 - MEASURING TESTING