Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4621171 | Electroacoustic transducer and a method for manufacturing thereof | Hiroto Wada | 1986-11-04 |
| 4615105 | Electroacoustic transducer and a method for manufacturing thereof | Hiroto Wada | 1986-10-07 |
| 4471393 | Tape recorder | Hideyasu Ishigo | 1984-09-11 |