Issued Patents 2021
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11015757 | Pipe-making apparatus and pipe-making method | Hiroshi Sugahara, Tatsurou Baba, Masahiro Yamasaki | 2021-05-25 |
| 10920918 | Pipe-making apparatus and pipe-making method for spiral pipe | Hiroshi Sugahara, Tatsurou Baba, Masahiro Yamasaki, Junichi Nagatsuka | 2021-02-16 |