Method and system for presence detection
US9886696B2 · kind B2 · utility
16Cited by
20References
61Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 19, 2010 |
| Grant date | Feb 6, 2018 |
| Priority date | — |
| Expiry date | Dec 9, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04W4/30
- WIPO fieldIT methods for management
- WIPO sectorElectrical engineering
Abstract
The transmission system transmits an encrypted identifier ultrasonically in an open-air environment using an ultrasonic transmitter. The ultrasonic identifier is associated with a location, which may be a store or a department within a store, and may be received by a microphone on a mobile phone. The identifier may be used to infer presence of the mobile phone user at the location associated with the identifier. The transmitter may include an ultrasonic transducer. The system may further provide a reward, responsive to inferring presence at the location.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.