Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4881917 | Remote control steering mechanism | Woo Sok Yang | 1989-11-21 |
| 4879205 | Information storage medium and a method of manufacturing the same | — | 1989-11-07 |
| 4857592 | Polyvinyl chloride resin composition | Mitsuru Hoshino, Haruhiko Yusa | 1989-08-15 |
| 4803660 | Optical recording medium | Tadashi Kobayashi, Naomasa Nakamura | 1989-02-07 |