Issued Patents 1997
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5617912 | Process for preparing and using a ceramic shell as a casting mold with reducing properties | Heinrich Ballewski | 1997-04-08 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5617912 | Process for preparing and using a ceramic shell as a casting mold with reducing properties | Heinrich Ballewski | 1997-04-08 |