Issued Patents All Time
Showing 1–7 of 7 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5594805 | Loudspeaker | Yoshio Sakamoto, Akio Tanase, Kaoru Yamazaki | 1997-01-14 |
| 5253301 | Nondirectional acoustic generator and speaker system | Masakatsu Sakamoto, Kaoru Yamazaki | 1993-10-12 |
| 5091958 | Wiring structure of loudspeaker | Yoshio Sakamoto | 1992-02-25 |
| 5031720 | Speaker diaphragm | Shuhei Ohta, Masakatu Sakamoto, Yoshikazu Shirasaki, Ichiro Yoshida | 1991-07-16 |
| 4772513 | Method for forming a hard carbon thin film on article and applications thereof | Masakatsu Sakamoto, Shuhei Ohta, Kaoru Yamazaki, Yoichi Yaguchi, Hiroaki Toshima +1 more | 1988-09-20 |
| 4752963 | Electroacoustic converter having a recessed step on the center pole | Kaoru Yamazaki, Masatoshi Kunii, Toshihiro Hayashi, Yoshio Sakamoto | 1988-06-21 |
| 4725345 | Method for forming a hard carbon thin film on article and applications thereof | Masakatsu Sakamoto, Shuhei Ohta, Kaoru Yamazaki, Yoichi Yaguchi, Hiroaki Toshima +1 more | 1988-02-16 |