Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4840862 | Photoconductive composition having an azaazulenium salt | Naonori Makino, Takanori Hioki, Yoshio Inagaki | 1989-06-20 |
| 4814245 | Electrophotographic photoreceptor containing a phthalocyanine pigment and a bishydrazone compound | Naonori Makino, Hideo Sato | 1989-03-21 |