Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4863795 | Magnetic recording medium | Itsuro Nakamura, Junichi Ito | 1989-09-05 |
| 4862066 | Oil leakage sensor element | Tazuru Ishikawa | 1989-08-29 |
| 4796046 | Copy machine toner fixing device | Hirosuke Suzuki, Etsuo Yamazaki | 1989-01-03 |