Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5539819 | Credit card which generates a DTMF tone | Masahiro Koura | 1996-07-23 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5539819 | Credit card which generates a DTMF tone | Masahiro Koura | 1996-07-23 |