Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5042138 | Method and apparatus for manufacturing a corrugated pipe | Noboru Umemori, Yukio Horii | 1991-08-27 |
| 4976289 | Corrugated pipe | Noboru Umemori, Yukio Horii | 1990-12-11 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5042138 | Method and apparatus for manufacturing a corrugated pipe | Noboru Umemori, Yukio Horii | 1991-08-27 |
| 4976289 | Corrugated pipe | Noboru Umemori, Yukio Horii | 1990-12-11 |