Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5914468 | Keyboard unit and key switch | Takashi Nishimura, Toshimi Chiba, Zenzo Tozuka, Yuichiro Nozawa | 1999-06-22 |
| 5256843 | Keyboard switch and method of manufacturing the same | Toshimi Chiba, Zenzou Tozuka | 1993-10-26 |
| 4927990 | Spring-biased push-button switch having a spring-loaded tactile feedback feature | Kazuo Aoki, Toshimi Chiba, Yasushi Nagatomo | 1990-05-22 |
| 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 |