Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4820503 | Catalytic hollow spheres | Taylor G. Wang, Daniel D. Elleman, Mark C. Lee | 1989-04-11 |
| 4804796 | Catalytic, hollow, refractory spheres, conversions with them | Taylor G. Wang, Daniel D. Elleman, Mark C. Lee | 1989-02-14 |