Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4766699 | Apparatus for grinding the edges of lenses | Lutz Gottschald, Fritz Kotting | 1988-08-30 |
| 4637168 | Spectacle lens edge grinding machine | Fritz Kotting | 1987-01-20 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4766699 | Apparatus for grinding the edges of lenses | Lutz Gottschald, Fritz Kotting | 1988-08-30 |
| 4637168 | Spectacle lens edge grinding machine | Fritz Kotting | 1987-01-20 |