Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7936335 | Operation direction judging method for operation key in direction detecting switch | — | 2011-05-03 |
| 7852321 | Direction detection switch | Shuji Koga | 2010-12-14 |
| 6973582 | Audio signal output device in which optical signals are not output when a plug is not connected to an S/PDIF output terminal | Atsuko Sugiura, Naoya Ishii, Takashi Taga | 2005-12-06 |