Issued Patents 1982
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4358321 | Lead-free ceramic pink-coloring material consisting of chromium-tin-calcium-silicon-alkali metal oxide plus bismuth and/or phosphorus oxide and process | Heinz-Dieter DeAhna | 1982-11-09 |