Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5937045 | Telephone call fee notifying system and telephone call fee notifying apparatus | Naoko Yaoya, Hiroshi Sato, Saburou Ikeda, Takemasa Takahashi, Hiromi Atsuta +2 more | 1999-08-10 |