Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5999615 | Telephone exchange system and switching connection method improved in efficiency for long-distance calling | — | 1999-12-07 |
| 5423062 | System for reducing congestion of radio paging channel | — | 1995-06-06 |
| 5357557 | Inter-mobile-terminal testing method in cellular automobile telephone system | — | 1994-10-18 |