Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4863824 | Toner for developing electrostatic latent image | Masafumi Uchida, Hiroyuki Takagiwa, Satoru Ikeuchi, Hideyo Nishikawa, Shingo Tanaka | 1989-09-05 |
| 4804622 | Toner composition for electrophotography | Shingo Tanaka, Hideyo Nishikawa | 1989-02-14 |