Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4828771 | Method of producing porous material having open pores | Akio Matsumoto | 1989-05-09 |
| 4797425 | Method of producing porous material having open pores | Akio Matsumoto | 1989-01-10 |