Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9031265 | Piezoelectric speaker, piezoelectric audio device employing piezoelectric speaker, and sensor with alert device attached | Minoru Fukushima, Osamu Akasaka, Akihiro Nishikawa | 2015-05-12 |