Issued Patents 1994
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5362691 | Sintered material based on Si.sub.3 N.sub.4 and processes for its production | Gerhard Leimer, Lutz Frassek | 1994-11-08 |
| 5308561 | Process for production of a Si.sub.3 N.sub.4, based material | Gerhard Leimer, Ernst Gugel | 1994-05-03 |