Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4807077 | Short time recording tape cassette having a larger open space than that of a long time recording tape cassette | Osamu Zaitsu | 1989-02-21 |
| 4803574 | Arrangement of recording and/or reproducing apparatus | Akio Konishi, Osamu Zaitsu, Hideaki Yoshio | 1989-02-07 |