Issued Patents 1994
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5325428 | Automatic switching-back device for telephone circuit | Seizo Iwai, Tsuneko Iwai, Yukiko Iwai | 1994-06-28 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5325428 | Automatic switching-back device for telephone circuit | Seizo Iwai, Tsuneko Iwai, Yukiko Iwai | 1994-06-28 |