Issued Patents 1989
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4871579 | Process and device for spraying a reaction mixture capable of forming a transparent protective layer of high optical quality | Jean-Louis Bravet, Gerd Leyens, Siegfried Pikhardt, Herbert Bayer | 1989-10-03 |