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Yoshifumi Yamanaka

HS Hitachi Seiko: 1 patents #2 of 14Top 15%
📍 Otofuke, JP: #7 of 16 inventorsTop 45%
Overall (1989): #39,989 of 140,708Top 30%
1
Patents 1989

Issued Patents 1989

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
4876433 Inverter controlled-type power source for arc welding Takayuki Kashima, Akira Sakabe 1989-10-24