Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4823377 | System for setting registration mode for key telephone set | Ryuzo Sugiura, Hisami Ojima | 1989-04-18 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4823377 | System for setting registration mode for key telephone set | Ryuzo Sugiura, Hisami Ojima | 1989-04-18 |