Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5251257 | 2-wire/3-wire converting apparatus | — | 1993-10-05 |
| 5111148 | Battery voltage discriminator circuit | Yoshio Watanabe | 1992-05-05 |
| 5086453 | Apparatus for communicating data via a telephone | Tadamasa Maekawa | 1992-02-04 |
| 5036191 | Key input apparatus with light-shielding plates and liquid crystal shutter | — | 1991-07-30 |