Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| D496013 | Portable player | — | 2004-09-14 |
| D432116 | Speaker box | Kazuo Ichikawa | 2000-10-17 |
| D324048 | Tone generator for an audio system | — | 1992-02-18 |
| D306725 | Transceiver head set | — | 1990-03-20 |