Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6229387 | Output signal converter for ampliciation or attenuation of tube amplifier output while maintaining output properties | Fumio Mieda, Yasuhiko Mori | 2001-05-08 |
| 6175271 | Output signal converter for tube amplifiers | Fumio Mieda, Yasuhiko Mori | 2001-01-16 |