Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4855091 | Method for the preparation of carbon filaments | John W. Linowski | 1989-08-08 |
| 4818740 | Catalyst for the selective oxidation of sulfur containing compounds to elemental sulfur | Pieter Hildegardus Berben | 1989-04-04 |