Issued Patents 2018
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9963083 | Vehicle loudspeaker system | Arata Tada, Keita Tanno | 2018-05-08 |
| 9942636 | Vehicle-mounted speaker system | Kei Tanabe, Akio Suzuki | 2018-04-10 |
| 9908216 | Grinding wheel manufacturing method and grinding wheel | Shinji Soma, Naoto Ono, Tomoyuki Kasuga | 2018-03-06 |