Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4653103 | Loudspeaker structure and system | Tohru Mori, Yoshio Ariki | 1987-03-24 |
| 4586194 | Earphone characteristic measuring device | Tanetoshi Miura, Kaoru Okabe, Haruo Hamada | 1986-04-29 |