Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11963474 | Spreader device | Sumio Yagyu, Takao Nakagawa, Masaru Kawane | 2024-04-23 |
| 11273834 | Work management system and work management method | Sumio Yagyu, Takao Nakagawa, Masaru Kawane | 2022-03-15 |