Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4956259 | Spherical electrophotographic toner particles comprising carbon and preparation thereof | Yoshitsugu Shirasaki | 1990-09-11 |
| 4895785 | Spherical toner particle | Yoshitsugu Shirasaki | 1990-01-23 |