Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D457870 | Telephone with the display screen | Fumiyoshi Toyoshima, Masafuku Akatsu, Yuichiro Shibata, Takayuki Yoshimoto, Akio Kurihara +1 more | 2002-05-28 |
| D433677 | Telephone exchanger | Kazuo Ikeda, Kentaro TSUDA, Muneyoshi Mikuni | 2000-11-14 |