Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9573489 | Control device for railway power conditioner and control system for railway power conditioner | Yasuhiro Nakatsuka, Yasuhiro Imazu, Osamu Sakuchi, Masaya Ichinose, Yasuhiro Kiyofuji +6 more | 2017-02-21 |
| 6679423 | Electronic-money rewarding system for lost and found IC card | Makoto Ijichi, Shigeyuki Itoh, Masaaki Hiroya, Hiroshi Asao, Kei Yonezawa | 2004-01-20 |
| 6273334 | Electronic-money rewarding system for lost and found IC card | Makoto Ijichi, Shigeyuki Itoh, Masaaki Hiroya, Hiroshi Asao, Kei Yonezawa | 2001-08-14 |
| 5932859 | Electronic-money rewarding system for lost and found IC card | Makoto Ijichi, Shigeyuki Itoh, Masaaki Hiroya, Hiroshi Asao, Kei Yonezawa | 1999-08-03 |