Issued Patents 2004
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6696926 | Audible floor call recording method and braille information notification device | Yohsinobu Tsukamoto, Toshirou Takahashi | 2004-02-24 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6696926 | Audible floor call recording method and braille information notification device | Yohsinobu Tsukamoto, Toshirou Takahashi | 2004-02-24 |