Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12431851 | Audio mixing device and electronic device | Takao Katayama, Tsutomu Nonaka | 2025-09-30 |
| 12156011 | Audio mixing device and electronic device | Takao Katayama, Tsutomu Nonaka | 2024-11-26 |
| 11647331 | Circuit device, sound reproduction device, and electronic apparatus | Takao Katayama, Tsutomu Nonaka | 2023-05-09 |
| 7076471 | Filtering method and apparatus | Akinari Todoroki | 2006-07-11 |