Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4873549 | Device for detecting the life of an image forming process unit, opening of a seal of the unit and attachment of the unit to an image forming apparatus | Tomio Tada, Junichi Hirobe, Junichi Takamatsu, Yukihiro Aikawa | 1989-10-10 |