Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6771161 | Data transmission system using a human body as a signal transmission path | Kenji Doi, Hitoshi Sakakibara, Masaru Hashimoto, Keiichi Yoshida, Masaki Koyama +2 more | 2004-08-03 |
| 6525670 | In-home health care system | Kenji Doi, Hitoshi Sakakibara, Masaru Hashimoto, Keiichi Yoshida, Kazuya KITAYAMA +3 more | 2003-02-25 |