Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5653899 | Method of making a steel pipe by electric resistance heating of opposing edges of a sheet prior to laser welding | Takayuki Odake, Yoshiichi Ishizawa, Toshihiro Takamura | 1997-08-05 |