Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6625293 | Microphone | Naoaki Matsumoto | 2003-09-23 |
| 6560346 | Pipe microphone device | Takashi Ohta, Katsunori Murozaki | 2003-05-06 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6625293 | Microphone | Naoaki Matsumoto | 2003-09-23 |
| 6560346 | Pipe microphone device | Takashi Ohta, Katsunori Murozaki | 2003-05-06 |