Issued Patents 1994
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5357505 | Device for bidirectional communication on a telephone line | Mihoji Tsumura | 1994-10-18 |
| 5353337 | Device for the transmission of data by telephone line | Mihoji Tsumura | 1994-10-04 |
| 5294746 | Backing chorus mixing device and karaoke system incorporating said device | Mihoji Tsumura | 1994-03-15 |