Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5268078 | Aluminum plates for automobile body panels and method of pretreatment for painting thereof | Takahiro Koyama, Tatsumi Takahashi | 1993-12-07 |
| 5176963 | Aluminum plates for automobile body panels and method of pretreatment for painting thereof | Takahiro Koyama, Tatsumi Takahashi | 1993-01-05 |