Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4874913 | Luminous element holding structure for an illuminated key switch | Kazuo Aoki | 1989-10-17 |
| 4851618 | Keyboard | Fumihiro Amino, Zenzou Tozuka, Kazuo Aoki | 1989-07-25 |
| 4837412 | Keyboard of a membrane contact type | — | 1989-06-06 |