Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5213736 | Process for making an electroconductive polymer composition | Masao Sumita, Hirokazu Yamada | 1993-05-25 |
| 5171489 | Method of producing composite staple fibers consisting of resin matrix and fine inorganic fibers | Hirokazu Yamada, Ryosuke Kamei | 1992-12-15 |