Issued Patents 2018
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10019764 | Work management system and work management method | Sadao Sugiyama, Hideo Tsuchiya, Shiro Sugihara, Kiyoshi Yoshikawa | 2018-07-10 |
| 9959578 | Work management system and work management method | Sadao Sugiyama, Hideo Tsuchiya, Shiro Sugihara, Kiyoshi Yoshikawa | 2018-05-01 |
| 9953374 | Work management system and work management method | Sadao Sugiyama, Hideo Tsuchiya, Shiro Sugihara, Kiyoshi Yoshikawa | 2018-04-24 |
| 9953375 | Work management system and work management method | Sadao Sugiyama, Hideo Tsuchiya, Shiro Sugihara, Kiyoshi Yoshikawa | 2018-04-24 |
| 9953376 | Work management system and work management method | Sadao Sugiyama, Hideo Tsuchiya, Shiro Sugihara, Kiyoshi Yoshikawa | 2018-04-24 |