SK

Shigeki Kumagai

JS Jfe Steel: 1 patents #825 of 1,401Top 60%
Mitsubishi Electric: 1 patents #15,491 of 25,717Top 65%
Overall (All Time): #1,720,888 of 4,157,543Top 45%
2
Patents All Time

Issued Patents All Time

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
12339121 Heavy goods vehicle Hideki Hirayama, Yusuke Kaneta, Shinji Nanba, Toshiyuki Kohara, Shuei Tanaka +1 more 2025-06-24
8548723 Car navigation system Tadatomi Ishigami, Masatoshi Fujii, Keika Kan, Sadami Ouchi, Hiroaki Kato 2013-10-01