System and method for detecting presence of an object
US8917179B2 · kind B2 · utility
7Cited by
1References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 6, 2013 |
| Grant date | Dec 23, 2014 |
| Priority date | — |
| Expiry date | Aug 24, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/2448
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A system for detecting the presence of an object may include a radio frequency identification (RFID) reader configured to transmit a plurality of interrogation signals, a response controller that is configured to receive the plurality of interrogation signals and respond by transmitting a plurality of standard response signals, and a mixing element that is configured to generate a mixed signal when in the presence of the plurality of interrogation signals and the standard response signals. The RFID reader outputs an alert signal upon receipt of the mixed signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.