Thomas He
26Patents
10h-index
21Co-inventors
71Inventor score
Filing activity: Apr 6, 1994 → May 20, 2005
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5929399A | Automatic open loop force gain control of magnetic actuators for elevator active suspension | Performing Operations; Transporting | 18 | Expired |
| US5651428A | Stationary actuator moving vane elevator car door coupling | Performing Operations; Transporting | 18 | Expired |
| US5732796A | Elevator car evacuation deterrent device | Performing Operations; Transporting | 17 | Expired |
| US5651427A | Elevator door coupling and hold-close apparatus | Performing Operations; Transporting | 15 | Expired |
| US5736693A | Elevator door drive using dual secondary linear induction motor | Fixed Constructions | 14 | Expired |
| US5538106A | Rotationally stiff elevator car door coupling | Performing Operations; Transporting | 14 | Expired |
| US5509504A | Velocity regulated, open current loop, variable voltage, variable frequency, linear induction motor drive for an elevator car door | Physics | 12 | Expired |
| US5487449A | Magnetic elevator door coupling | Performing Operations; Transporting | 11 | Expired |
| US5503248A | Maintaining open loop current drive to linear induction motor | Fixed Constructions | 11 | Expired |
| US5612518A | Linear induction motor door drive assembly for elevators | Performing Operations; Transporting | 11 | Expired |
| US5668355A | Elevator cab door drive system | Performing Operations; Transporting | 10 | Expired |
| US5495918A | Smooth and quiet linear induction motor elevator door operation | Performing Operations; Transporting | 10 | Expired |
| US5864102A | Dual magnet controller for an elevator active roller guide | Performing Operations; Transporting | 10 | Expired |
| US5454447A | Elevator hoistway door bolt lock | Performing Operations; Transporting | 10 | Expired |
| US6305502A | Elevator cab floor acceleration control system | Performing Operations; Transporting | 10 | Expired |
| US5808246A | Triac drive for three-phase line-powered linear induction motor elevator door operator | Electricity | 8 | Expired |
| US6943508B2 | Tubular linear synchronous motor control for elevator doors | Performing Operations; Transporting | 7 | Expired |
| US5682023A | Time-optimal control of an AC line-driven linear motor elevator door operator | Physics | 5 | Expired |
| US5669465A | Elevator hoistway door bolt lock | Performing Operations; Transporting | 5 | Expired |
| US6431325B1 | Acceleration control system utilizing elevator platform stabilization coupler | Performing Operations; Transporting | 4 | Expired |
| US7202615B2 | Tubular linear synchronous motor control for elevator doors | Performing Operations; Transporting | 4 | Expired |
| US5485896A | Rotary elevator car door coupling | Performing Operations; Transporting | 3 | Expired |
| US6435314B1 | Elevator platform stabilization coupler | Performing Operations; Transporting | 3 | Expired |
| US5494137A | Elevator door mounting system | Fixed Constructions | 3 | Expired |
| US5435415A | Cammed wedge elevator car door coupling | Performing Operations; Transporting | 2 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.