Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11543447 | Damage predicting device and damage predicting method for power semiconductor switching element, AC-DC converter, and DC-DC converter | Hidetoshi Ikeda | 2023-01-03 |
| 11271489 | AC-DC power supply and motor | Xiaoxia Sun, Haruki Kitakawa | 2022-03-08 |
| 5904444 | Propelling apparatus for underground propelling construction work | Teruo Kabeuchi, Masaya Hattori, Yukishige Yamada, Shigeaki Okuyama, Masao Nakagawa +3 more | 1999-05-18 |
| 5878825 | Underground propelling method | Shigeaki Okuyama, Teruo Kabeuchi, Katsuhiko Mukuno, Masaya Hattori, Kazunori Tsujimoto +3 more | 1999-03-09 |