Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5696817 | Apparatus and method for determining the source of a telephone communication | — | 1997-12-09 |
| 5606158 | Collection and processing apparatus of repeatedly used recording media | Takatoshi Takemoto | 1997-02-25 |