James M. Draper
13Patents
6h-index
23Co-inventors
66Inventor score
Filing activity: Dec 17, 1991 → May 6, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US8939262B2 | Elevator over-acceleration and over-speed protection system | Performing Operations; Transporting | 28 | Active |
| US8631909B2 | Electromagnetic safety trigger | Performing Operations; Transporting | 16 | Active |
| US5495919A | Safety brake apparatus for an elevator car or counterweight | Performing Operations; Transporting | 15 | Expired |
| US5156239A | Disc brake/load weighing assembly for elevator drive sheave | Performing Operations; Transporting | 13 | Expired |
| US9663327B2 | Elevator braking system | Performing Operations; Transporting | 11 | Active |
| US6457569B2 | Rotary actuated overspeed safety device | Performing Operations; Transporting | 6 | Expired |
| US6296080A | Variable traction mechanism for rotary actuated overspeed safety device | Performing Operations; Transporting | 5 | Expired |
| US8827044B2 | Over-acceleration and over-speed detection and processing system | Performing Operations; Transporting | 3 | Active |
| US11124386B2 | Safety brake configuration for elevator application | Performing Operations; Transporting | 2 | Active |
| US9821983B2 | Elevator braking device | Performing Operations; Transporting | 2 | Active |
| US6000503A | Sliding two speed door mechanism for an elevator car | Performing Operations; Transporting | 1 | Expired |
| US10407278B2 | Safety device for elevators | Performing Operations; Transporting | 1 | Active |
| US11745981B2 | Mounting apparatus for safety brake | Performing Operations; Transporting | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.