Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5054012 | Sound reproducing device for playing a record disc having a plurality of recorded grooves | Eishi Koike | 1991-10-01 |
| 4876678 | Sound reproducing device for playing a record disc having a plurality of recorded grooves | Eishi Koike | 1989-10-24 |