Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4814301 | Polycrystalline sintered articles based on silicon nitride and sintering additives | Alfred Lipp | 1989-03-21 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4814301 | Polycrystalline sintered articles based on silicon nitride and sintering additives | Alfred Lipp | 1989-03-21 |