TO

Toyokazu Ohkubo

SC Sumitomo Metal Mining Co.: 2 patents #253 of 736Top 35%
📍 Niihama, JP: #234 of 473 inventorsTop 50%
Overall (All Time): #2,361,401 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
4389248 Method of recovering gold from anode slimes Toshimasa Iio 1983-06-21
4374098 Method of concentrating silver from anode slime Toshimasa Iio 1983-02-15