Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5192376 | Process for producing automobile body reinforcing steel pipe | Kazumasa Yamazaki | 1993-03-09 |
| 5181974 | Automobile body reinforcing steel pipe | Kazumasa Yamazaki | 1993-01-26 |