Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4834281 | Porous metallic material, porous structural material and porous decorative sound absorbing material, and methods for manufacturing the same | Fumihiro Nakagawa | 1989-05-30 |
| 4828932 | Porous metallic material, porous structural material and porous decorative sound absorbing material, and methods for manufacturing the same | Fumihiro Nakagawa | 1989-05-09 |