Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5334814 | Electrode for spot welding | Keizo Namba, Hiromichi Sano, Makoto Yonemitsu, Masaki Kumagai, Masanori Tsunekawa | 1994-08-02 |
| 4949895 | Process of fixing internally titanium-lined doubled-walled tubing structure to titanium tube sheet | Yoshihiko Sugiyama, Keizo Namba, Hiromiti Sano | 1990-08-21 |