Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861379 | Spherical fine particulate pigment and process for preparing the same | Kazuko Iwano | 1989-08-29 |
| 4856419 | Process for collecting a contaminated substance and apparatus thereof | — | 1989-08-15 |