Issued Patents 2002
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6471251 | Spirally corrugated pipe elbow and method for manufacturing same | Tatsushi Yoshida | 2002-10-29 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6471251 | Spirally corrugated pipe elbow and method for manufacturing same | Tatsushi Yoshida | 2002-10-29 |