Issued Patents 1997
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5639816 | Polypropylene composition | Masayoshi Yamaguchi, Akio Ishimoto, Masahiro Sugi | 1997-06-17 |
| 5639829 | Polypropylene composition | Masayoshi Yamaguchi, Akio Ishimoto, Masahiro Sugi | 1997-06-17 |