Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4814301 | Polycrystalline sintered articles based on silicon nitride and sintering additives | Alfred Lipp | 1989-03-21 |
| 4743571 | Polycrystalline sintered bodies on a base of silicon nitride with high fracture toughness and hardness | Alfred Lipp, Hubert Thaler, Dietrich Lange | 1988-05-10 |