Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5006780 | Charging circuit | Kozo Tamura, Toshiharu Kodato, Yasuhiro Tsukamoto, Akira Iida | 1991-04-09 |
| 4994726 | Power supply apparatus for charging-type device | Kozo Tamura, Yasuhiro Tsukamoto, Akira Iida | 1991-02-19 |
| 4732674 | Water purifier | Kozo Tamura, Akira Maejima, Kenzo Mikada | 1988-03-22 |