Frederick H. Barker
25Patents
11h-index
16Co-inventors
61Inventor score
Filing activity: Nov 29, 1995 → Sep 27, 1999
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5861084A | System and method for minimizing horizontal vibration of elevator compensating ropes | Performing Operations; Transporting | 42 | Expired |
| US6123176A | Rope tension monitoring assembly and method | Performing Operations; Transporting | 35 | Expired |
| US5651426A | Synchronous elevator shuttle system | Performing Operations; Transporting | 19 | Expired |
| US5924524A | Integrated, multi-level elevator shuttle | Performing Operations; Transporting | 17 | Expired |
| US5758748A | Synchronized off-shaft loading of elevator cabs | Performing Operations; Transporting | 17 | Expired |
| US5601156A | Maintaining communications and power during transfer of horizontally moveable elevator cab | Performing Operations; Transporting | 16 | Expired |
| US5861586A | Horizontal and vertical passenger transport | Performing Operations; Transporting | 14 | Expired |
| US5773772A | Transferring elevator cabs between non-contiguous hoistways | Performing Operations; Transporting | 13 | Expired |
| US5785153A | Synchronizing elevator arrival at a level of a building | Performing Operations; Transporting | 12 | Expired |
| US5752585A | Elevator shuttle with auxiliary elevators at terminals | Performing Operations; Transporting | 12 | Expired |
| US5660249A | Elevator cabs transferred horizontally between double deck elevators | Performing Operations; Transporting | 12 | Expired |
| US5823299A | Shuttle elevators feeding local elevators | Performing Operations; Transporting | 11 | Expired |
| US5771995A | Locking elevator car frame to building during loading/unloading horizontally moveable cab | Performing Operations; Transporting | 8 | Expired |
| US5969304A | Elevator system having high rise elevator without express zone | Performing Operations; Transporting | 8 | Expired |
| US6173816A | Hallway-entered destination information in elevator dispatching | Performing Operations; Transporting | 7 | Expired |
| US5655625A | Emergency elevator cab commandeering shuttle | Performing Operations; Transporting | 6 | Expired |
| US5749441A | Extra deck elevator shuttle | Emerging Cross-Sectional Technologies | 4 | Expired |
| US5829553A | Fail-safe movement of elevator cabs between car frames and landings | Performing Operations; Transporting | 4 | Expired |
| US5862886A | Pretorque to unload elevator car/floor locks before retraction | Performing Operations; Transporting | 4 | Expired |
| US6578673B2 | Concrete elevator rail and guidance system | Fixed Constructions | 3 | Expired |
| US5663539A | Passenger transfer, double deck, multi-elevator shuttle system | Emerging Cross-Sectional Technologies | 3 | Expired |
| US6038980A | Transferring freight or passenger cabs between moving bogies | Performing Operations; Transporting | 2 | Expired |
| US5950769A | Bridge rails for horizontally moveable passenger or freight cab | Performing Operations; Transporting | 1 | Expired |
| US6981575B2 | Concrete rail safety device for an elevator car | Mechanical Engineering; Lighting; Heating | 1 | Expired |
| US5695024A | Car operated safety gate for horizontally transferrable elevator cab | Performing Operations; Transporting | 1 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.