Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4866480 | Developing apparatus using one-component non-magnetic toner | Masahiro Hosoya, Shigeru Fujiwara | 1989-09-12 |
| 4833059 | Developing method using one-component non-magnetic toner with positive frictional charge | Shinya Tomura, Tetsuo Okuyama, Mitsunaga Saito | 1989-05-23 |