Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10619407 | Sliding fire door | Naoki Kawabe, Yoshihiro Hosaka, Takafumi Yamazaki | 2020-04-14 |
| 9932767 | Fire door | Yukihisa Matsuo, Kouji Yasuda, Yoshihiro Hosaka, Naoki Kawabe | 2018-04-03 |