Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9248485 | Method for producing spiral pipe | Tomonori Yamaji, Toshio Yamane | 2016-02-02 |
| 8448486 | Apparatus for forming curls in reinforcing material-attached profile strip, method for producing spiral pipe, and apparatus for producing spiral pipe | Tomonori Yamaji, Toshio Yamane | 2013-05-28 |