Friedhelm Frede
9Patents
4h-index
2Co-inventors
43Inventor score
Filing activity: Feb 24, 2003 → Nov 5, 2018
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6883577B2 | Rollup door with rollable door leaf | Fixed Constructions | 9 | Expired |
| US9915094B2 | Roller shutter for opening and closing a doorway | Fixed Constructions | 9 | Active |
| US10253557B2 | Roller shutter for opening and closing a doorway | Fixed Constructions | 6 | Active |
| US8684064B2 | High speed rollup door with rollable door leaf | Fixed Constructions | 4 | Active |
| US8371357B2 | System to guide the slats of an industrial roller door to reduce damages after crash | Fixed Constructions | 4 | Active |
| US8267146B2 | Adjustable counterbalance system for roller doors | Fixed Constructions | 1 | Active |
| US8985179B2 | System for stabilizing the top lamella against wind load by using a linear chain | Fixed Constructions | 1 | Active |
| US9957749B2 | Sealing device for sealing a gap between a lintel and a roller shutter and a roller shutter with such a sealing device | Fixed Constructions | 1 | Active |
| US11661778B2 | High speed overhead door | Fixed Constructions | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.