Issued Patents 2004
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6812707 | Detection element for objects and detection device using the same | Tadashi Yonezawa, Seiro Yahata | 2004-11-02 |
| 6724690 | Wrist watch containing tag | Takashi Tsuchida, Seirou Yahata | 2004-04-20 |