Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4752963 | Electroacoustic converter having a recessed step on the center pole | Kaoru Yamazaki, Shiro Iwakura, Toshihiro Hayashi, Yoshio Sakamoto | 1988-06-21 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4752963 | Electroacoustic converter having a recessed step on the center pole | Kaoru Yamazaki, Shiro Iwakura, Toshihiro Hayashi, Yoshio Sakamoto | 1988-06-21 |