Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5678143 | Image forming apparatus for collecting residual toner from a drum using an AC voltage | Akira Nagahara, Sachio Sasaki, Mitsuhito Furukawa, Shigenobu Utaka, Yoshio Yamaguchi +3 more | 1997-10-14 |