Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4837046 | Method for forming ferrite film | Takao Saito, Katsukiyo Ishikawa, Masanori Abe, Yutaka Tamaura | 1989-06-06 |
| 4816364 | Magnetic carrier particles for electrophotographic developer having plated layer of iron oxide | Takao Saito, Kouichi Nagata, Katsukiyo Ishikawa, Eio Hisajima | 1989-03-28 |