Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4830800 | Method of producing a dense refractory silicon nitride (SI.sub.3 N.sub.4) compact with one or more crystalline intergranular phases | Gareth J. Thomas, Sylvia M. Johnson | 1989-05-16 |