Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6700466 | Contactor | Ritsu Yamamoto, Tsutomu Shimomura, Riichi Uotome, Hideki Enomoto, Mamoru Tateno +1 more | 2004-03-02 |
| 6075429 | Single pole relay switch | Riichi Uotome, Ritsu Yamamoto, Masahiro Ito, Narutoshi Hoshino | 2000-06-13 |
| 5892194 | Sealed contact device with contact gap adjustment capability | Riichi Uotome, Takaaki Chuzawa, Toshiyuki Suzuki, Kiyoshi Goto, Ritsu Yamamoto +1 more | 1999-04-06 |
| 5680084 | Sealed contact device and operating mechanism | Hideki Kishi, Takaaki Chuzawa, Riichi Uotome | 1997-10-21 |
| 5420555 | Plural sealed contact units with common electromagnetic operating mechanism | Hideya Kondo, Mamoru Tateno, Yoichi Yokoyama, Hirofumi Fukazawa, Riichi Uotome +1 more | 1995-05-30 |
| 4866227 | Sealed contact device | Mamoru Tateno, Kiwamu Shibata, Hiromichi Inoue | 1989-09-12 |