Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4383137 | Key telephone system with multiple processor control | Noriyoshi Sanada, Mitsuyoshi Murakami, Junzo Kikuchi, Masaki Kuroda | 1983-05-10 |
| D258288 | Telephone set with a digital clock | Keizo Minemura | 1981-02-17 |