Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5652576 | Switching system and information storing equipment | Akira Kusaba, Yusuke Yamamoto | 1997-07-29 |
| 4969182 | Method of telephone call wherein status data inhibits calls and indicates to the caller the reason the called subscriber is unavailable | Toko Ohtsubo, Masahiro Kumon, Akihiro Usui | 1990-11-06 |