Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4841676 | Turning tool for machining the edges of plastic lenses | — | 1989-06-27 |
| 4837978 | Machine for grinding the edges of lenses | Fritz Kotting | 1989-06-13 |
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4841676 | Turning tool for machining the edges of plastic lenses | — | 1989-06-27 |
| 4837978 | Machine for grinding the edges of lenses | Fritz Kotting | 1989-06-13 |