Issued Patents All Time
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4654931 | Hinge device with brake spring for tilting windows | Siegfried Sonneborn, Manfred Handel, Ernst Mack, Peter H. Sorensen | 1987-04-07 |
Showing 1–1 of 1 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4654931 | Hinge device with brake spring for tilting windows | Siegfried Sonneborn, Manfred Handel, Ernst Mack, Peter H. Sorensen | 1987-04-07 |