RFID-based item presence detection
US11461570B1 · kind B1 · utility
7Cited by
2References
20Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2021 |
| Grant date | Oct 4, 2022 |
| Priority date | — |
| Expiry date | Mar 22, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q21/065
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An RFID-based item tracking system may use statistical methods to determine whether a tag or tagged item that does not respond when inventoried is present in a particular zone or reader antenna field-of-view. In one embodiment, the item tracking system may determine an observability of an item based on one or more initial trials. Upon not detecting the item in one or more subsequent trials, the item tracking system may estimate whether the item is still present based on the observability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.