Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5151932 | Method and system for selectively communicating with a telephone or a non-telephone terminal through a public telephone network | Masato Arizumi, Norio Ozawa, Yasuo Haruta | 1992-09-29 |