Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4880666 | Method of manufacturing magnetic recording medium | Takeo Ito, Minoru Hashimoto, Toshio Fukaya, Masumi Koishi | 1989-11-14 |
| 4819087 | System for precisely editing audio signals on a videotape | Katsuichi Tachi | 1989-04-04 |