RA

Ryoichi Arita

HC Hitachi Construction Machinery Co.: 1 patents #701 of 1,234Top 60%
KS Kabushiki Kaisha Sankei: 1 patents #5 of 13Top 40%
Overall (All Time): #3,632,725 of 4,157,543Top 90%
1
Patents All Time

Issued Patents All Time

Showing 1–1 of 1 patents

Patent #TitleCo-InventorsDate
6142577 Hydraulic muck handling system for tunnel boring machine Minoru Tayama, Kiyoshi Tsuchiya, Yasuaki Ishikawa, Masaaki Miki, Kazunori Ueda 2000-11-07