Issued Patents 1989
Showing 1–9 of 9 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4886220 | Magnetic tape cassette | — | 1989-12-12 |
| 4844378 | Magnetic tape cassette having improved erasure preventing device | — | 1989-07-04 |
| 4840760 | Manufacturing method for magnetic tape cassette | — | 1989-06-20 |
| 4841403 | Lid spring locking structure in a magnetic tape cassette | Masao Tsuruta, Seiji Kiuchi, Akira Honjyoh, Osamu Suzuki | 1989-06-20 |
| 4832285 | Magnetic tape cassette | Osamu Suzuki | 1989-05-23 |
| 4825320 | Club magnetic tape cassette having a protective layer | Osamu Suzuki | 1989-04-25 |
| 4812939 | Magnetic recording disc having tensioned and elastically-supported recording surface | — | 1989-03-14 |
| 4797768 | Magnetic tape cassette with spring biased U-shaped pivotable guard panel | Osamu Suzuki | 1989-01-10 |
| 4796135 | Two layered tape pad for a magnetic tape cassette | — | 1989-01-03 |