AO

Atsuhumi Okamoto

SI Sumitomo Metal Industries: 1 patents #5 of 78Top 7%
Overall (1997): #174,362 of 185,788Top 95%
1
Patents 1997

Issued Patents 1997

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
5699690 Method and apparatus for manufacturing hollow steel bars Munekatsu Furugen, Shotaro Hamazaki, Norimasa Kameoka 1997-12-23