Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5563934 | Pay phone call control apparatus for allowing calls using pre-paid cards | — | 1996-10-08 |
| 4819261 | Public telephone set | Yoshiaki Takeda, Kazuo Asada | 1989-04-04 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5563934 | Pay phone call control apparatus for allowing calls using pre-paid cards | — | 1996-10-08 |
| 4819261 | Public telephone set | Yoshiaki Takeda, Kazuo Asada | 1989-04-04 |