Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5133595 | Length-adjustable spectable temple | Heinz Gutbrod | 1992-07-28 |
| 4946268 | Length-adjustable spectacle temple | Jurgen Rossner | 1990-08-07 |
| 4932771 | Self-opening spectacle frame | — | 1990-06-12 |