Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4869765 | Production process of bobbin for voice coil | Koyoshi Shimoyama | 1989-09-26 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4869765 | Production process of bobbin for voice coil | Koyoshi Shimoyama | 1989-09-26 |