Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9953499 | Alarm notifying system | Yuji Kawasaki, Ryosuke Kitago, Hirotaka Fukutsuka | 2018-04-24 |
| 9652961 | Alarm notifying system | Yuji Kawasaki, Ryosuke Kitago, Hirotaka Fukutsuka | 2017-05-16 |
| 9508240 | Sound receiving apparatus, sound receiving method, sound receiving system, and wireless microphone | Yuji Kawasaki, Ryosuke Kitago, Hirotaka Fukutsuka | 2016-11-29 |
| 9031258 | Acoustic feedback suppression apparatus, microphone apparatus, amplifier apparatus, sound amplification system, and acoustic feedback suppression method | Ryosuke Kitago, Yuji Kawasaki | 2015-05-12 |