Issued Patents 1989
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4833000 | Ceramic monolithic structure having an internal cavity contained therein and a method of preparing the same | Richard C. Assmus | 1989-05-23 |
| 4814128 | Process for making a homogeneous doped silicon nitride article | Sheldon Lieberman, Sophia R. Su | 1989-03-21 |
| 4806295 | Ceramic monolithic structure having an internal cavity contained therein and a method of preparing the same | Richard C. Assmus | 1989-02-21 |