Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11473714 | Strip member for spiral pipe and rehabilitation method of existing pipe | Hiroshi Sugahara, Tatsurou Baba, Yoshirou Sugiyama | 2022-10-18 |
| D876001 | Strip member for pipes | Yoshirou Sugiyama, Hiroshi Sugahara | 2020-02-18 |