Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4847218 | Enamel frits for sheet steel with improved bonding | Hans-Joachim Schittenhelm | 1989-07-11 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4847218 | Enamel frits for sheet steel with improved bonding | Hans-Joachim Schittenhelm | 1989-07-11 |