Ultrasonic/electromagnetic non-contact buttons/switches for elevators
US7597177B2 · kind B2 · utility
5Cited by
6References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 27, 2004 |
| Grant date | Oct 6, 2009 |
| Priority date | — |
| Expiry date | Jul 7, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03K2217/94005
- WIPO fieldBasic communication processes
- WIPO sectorElectrical engineering
Abstract
A method of providing non-contact data selection, comprising the steps of providing at least one data selection, transmitting at least one signal in proximity to the at least one data selection, altering the path of the at least one transmitted signal through interaction with a selection device, detecting at least one altered signal, and determining selection of the selection device from the at least one altered signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.