Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861683 | Quaternary-containing resin used for magnetic recording media | Takeshi Nakachi, Akio Hata | 1989-08-29 |
| 4849496 | Ketone containing terpolymer | Makoto Takeda, Hisao Kinoshita, Akiko Fujishima | 1989-07-18 |
| 4803871 | Inspection device for inspecting projections on the surface of parts | Osamu Harada, Akio Kojima, Souhei Ikeda, Yoshihisa Tsuji | 1989-02-14 |