Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4297532 | Interfacing circuit status detection arrangement in a telephone exchange | Takeo Fukuda, Kazuhiko Hanawa, Kiyoshi Urui | 1981-10-27 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4297532 | Interfacing circuit status detection arrangement in a telephone exchange | Takeo Fukuda, Kazuhiko Hanawa, Kiyoshi Urui | 1981-10-27 |