Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6800681 | Basic magnesium sulfate fiber-reinforced polypropylene resin composition and injection molded article using the resin composition | Kenichi Ohkawa, Moriyasu Shimojo | 2004-10-05 |
| 6656987 | Polypropylene resin composition and injection molded article | Kenichi Ohkawa, Tomohisa Fukao | 2003-12-02 |