Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 12276976 | Work machine maintenance management system | Takashi Igarashi, Yasuhiko Abe | 2025-04-15 |
| 12152374 | Construction machine | Tsutomu Udagawa, Junji Yamamoto, Shigeyuki Sakurai, Hidenobu Tsukada, Atsushi Kanda | 2024-11-26 |
| 12077944 | Construction machine | Tsutomu Udagawa, Junji Yamamoto, Shigeyuki Sakurai | 2024-09-03 |
| 11274418 | Hydraulic work machine | Tsutomu Udagawa, Shigeyuki Sakurai | 2022-03-15 |
| 8443552 | Mounting structure of door guard bar | Kouji Kinoshita, Kazuhisa Chiba, Hiroki Okada | 2013-05-21 |