Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8720792 | Ballast retaining structure, tool jig, and bedded track | Mikihito Kobayashi, Masaki Seki, Yasuhito Watanabe, Junichi Koseki | 2014-05-13 |
| 8418932 | Wheel guard apparatus | Masaki Seki, Kazuhiro Miwa, Tomomi Funada, Takaaki Irie, Yoshio Morikawa +2 more | 2013-04-16 |