Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4798714 | Process for the preparation of silicon nitride low in carbon content | Gerhard Franz | 1989-01-17 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4798714 | Process for the preparation of silicon nitride low in carbon content | Gerhard Franz | 1989-01-17 |