Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4893766 | Tape cassette having a front lid and a back lid | Shuichi Yamashina, Yuji Iwahashi | 1990-01-16 |
| 4771353 | Magnetic tape cassette having a translucent rough surface on a reel flange | Koushi Yamaguchi | 1988-09-13 |