David M. Hughes
13Patents
6h-index
20Co-inventors
66Inventor score
Filing activity: Aug 26, 1982 → Sep 30, 2016
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5200583A | Adaptive elevator security system | Performing Operations; Transporting | 84 | Expired |
| US5487451A | System and method for determining the availability of an elevator car for response to hall calls | Performing Operations; Transporting | 17 | Expired |
| US5357064A | Elevator hall call cross-cancellation device | Performing Operations; Transporting | 14 | Expired |
| US8172043B2 | Elevator cross-dispatching system with inter group relative system response (IRSR) dispatching | Performing Operations; Transporting | 10 | Active |
| US5272287A | Elevator car and riser transfer | Physics | 8 | Expired |
| US9108824B2 | Remote access of an elevator control system with multiple subsystems | Performing Operations; Transporting | 7 | Active |
| US4463231A | Push-push switch | Electricity | 6 | Expired |
| US5923484A | Method of changing a thermomagnetic tape duplicator to an anhysteretic type of tape duplicator | Physics | 4 | Expired |
| US5644110A | Elevator service for dual lobby during up-peak | Performing Operations; Transporting | 4 | Expired |
| US10227209B2 | Orchestration of an occupant evacuation operation using destination entry fixtures | Performing Operations; Transporting | 1 | Active |
| US10011460B2 | Elevator dynamic displays for messaging and communication | Performing Operations; Transporting | 1 | Active |
| US10647024B2 | Wet press concrete slab manufacturing | Emerging Cross-Sectional Technologies | 0 | Active |
| US10294075B2 | Re-dispatching unoccupied elevator car for occupant evacuation operation | Performing Operations; Transporting | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.