Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5933485 | Call reservation technique for a subscriber of another exchange utilizing a no. 7 signal | Jeong-Sik Chang | 1999-08-03 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5933485 | Call reservation technique for a subscriber of another exchange utilizing a no. 7 signal | Jeong-Sik Chang | 1999-08-03 |