DO

Daisuke Oka

HC Hitachi Construction Machinery Tierra Co.: 2 patents #7 of 18Top 40%
Overall (2021): #168,459 of 548,734Top 35%
2
Patents 2021

Issued Patents 2021

Showing 1–2 of 2 patents

Patent #TitleCo-InventorsDate
11111650 Hydraulic drive system for construction machine Kiwamu Takahashi, Taihei Maehara, Takeshi Ishii, Yoshifumi Takebayashi, Natsuki Nakamura 2021-09-07
10995473 Construction machine Yoshifumi Takebayashi, Hajime Yoshida, Natsuki Nakamura 2021-05-04