Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5680158 | Communication apparatus including a plurality of light sources arranged in columns and lines corresponding to columns and lines of a plurality of key switches | Masaaki Yoshida, Isamu Shimoda, Yasuko Miyazaki, Masaaki Kanashiki | 1997-10-21 |