Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7372974 | Headphone with cord winder devices | Masaaki Tanaka, Fumio Usui, Tatsuro Shirai | 2008-05-13 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7372974 | Headphone with cord winder devices | Masaaki Tanaka, Fumio Usui, Tatsuro Shirai | 2008-05-13 |