Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5370428 | Mechanism for releasably locking sashes in door-or window frames | Erhard Kuhnt | 1994-12-06 |
| 5318333 | Device for locking and unlocking sashes in door- or window frames | — | 1994-06-07 |
| 5111615 | Window with pivotable sash and mechanism for locking the sash in closed position | Erhard Kuhnt | 1992-05-12 |