Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4328465 | Tone control circuit utilizing variable gain amplifier | Saburo Takaoka, Hiroyuki Hirano | 1982-05-04 |
| 4289928 | Tone control arrangement for use in sound reproducing instruments | Saburo Takaoka | 1981-09-15 |
| 4284965 | Tone control device | Hiroyuki Hirano | 1981-08-18 |
| 4271398 | Tone control device | Hiroyuki Hirano | 1981-06-02 |