Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4260857 | Office line connection circuit during service interruptions in key telephone apparatus | Tsuyoshi Shinoi | 1981-04-07 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4260857 | Office line connection circuit during service interruptions in key telephone apparatus | Tsuyoshi Shinoi | 1981-04-07 |