Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861441 | Method of making a black surface treated steel sheet | Katushi Saito, Yoshio Shindou, Fumio Yamazaki, Takashi Shimazu | 1989-08-29 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4861441 | Method of making a black surface treated steel sheet | Katushi Saito, Yoshio Shindou, Fumio Yamazaki, Takashi Shimazu | 1989-08-29 |