System and method for radio frequency tag group select
US5673037A · kind A · utility
169Cited by
11References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 9, 1994 |
| Grant date | Sep 30, 1997 |
| Priority date | — |
| Expiry date | Sep 9, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08C2201/20
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system and method is disclosed for selecting certain subgroups of radio frequency (RF) tags for querying, communicating, and/or identifying by a base station. The base station sends commands to a group tags within a RF field of the base station. The tags use control logic to determine whether or not they meet certain criteria sent out by the commands. This may cause the tags to change state which either prevents or allows a given tag to participate in an identification process. In this way, a given subgroup(s) of tags meeting certain criteria can be selected for querying, communicating, and/or identifying.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.