Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5645241 | Device for winding magnetic tape of tape cassette in good order | Hirohisa Koga, Manabu Hanjo | 1997-07-08 |
| 5295032 | Rotary magnetic head device | Hirohisa Koga, Kenji Kobayashi | 1994-03-15 |