Issued Patents 2011
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8041056 | Voltage supply circuit and microphone unit comprising the same | — | 2011-10-18 |
| 7929716 | Voltage supply circuit, power supply circuit, microphone unit using the same, and microphone unit sensitivity adjustment method | Fumiyuki Niwa, Masayuki Ida | 2011-04-19 |
| 7864970 | Voltage supply circuit and microphone unit | Fumiyuki Niwa, Masayuki Ida | 2011-01-04 |