Issued Patents 2004
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6799820 | Liquid container having a liquid detecting device | Minoru Usui, Kenji Tsukada | 2004-10-05 |
| 6793305 | Method and apparatus for detecting consumption of ink | Kenji Tsukada | 2004-09-21 |
| 6745626 | Liquid detecting piezoelectric device, liquid container and mounting module member | Minoru Usui, Kenji Tsukada | 2004-06-08 |
| 6729184 | Detector of liquid consumption condition | Kenji Tsukada | 2004-05-04 |