HF

Hirohisa Fujiyama

NS Nippon Steel: 2 patents #1,308 of 4,423Top 30%
Overall (All Time): #2,313,292 of 4,157,543Top 60%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
5175405 Method of automatically welding rails Kenichi Karimine, Makoto Okumura, Koichi Shinada, Nobuyuki Aoki, Kazuo Nagatomo 1992-12-29
4841116 Process for automatic fusion welding of rails Akira Kimura, Hiroshi Kashiwabara 1989-06-20