Issued Patents 2020
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10756771 | Wireless switch | Katsuya Marumo, Yasushi Kawashima, Hajime Umeki, Keisuke Yano | 2020-08-25 |
| 10547396 | State display apparatus, state display system, and radio transmission apparatus | Soji Ohmae, Hajime Umeki, Yasushi Kawashima, Hiroshi Okabe | 2020-01-28 |