Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4857243 | Process of making microspherules of activated carbon | Hasso von Blucher, Ernest De Ruiter | 1989-08-15 |
| 4843739 | Inner shoe material with adsorbent properties | Hasso von Blucher, Ernest De Ruiter | 1989-07-04 |