Issued Patents 2003
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6643582 | Work management method, management system and management apparatus suited to work sites | Hiroyuki Adachi, Genroku Sugiyama, Hiroshi Watanabe, Koichi Shibata, Hideki Komatsu | 2003-11-04 |
| 6619037 | Hydraulic driving device of civil engineering and construction machinery | Tsukasa Toyooka, Genroku Sugiyama, Kouji Ishikawa, Masao Nishimura, Tsuyoshi Nakamura | 2003-09-16 |