Secure system for tracking elements using tags
US7665661B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 28, 2005 |
| Grant date | Feb 23, 2010 |
| Priority date | — |
| Expiry date | Nov 18, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/3011
- WIPO fieldSemiconductors
- WIPO sectorElectrical engineering
Abstract
A system for tracking elements employing fixed tags that are permanently attached internally or externally to elements. The tags include radio-frequency (RF) communication units that have wireless communication with RF communicators. The wireless communications between the RF tags and the RF communicators operate with a tag communication protocol that defines the operations and sequences for storing information into and retrieval of information from tags. Each communicator has a processor for controlling a security routine with the tag. Each tag has a tag memory having storage locations for storing security information, a controller for accessing the tag memory to access security information in response to the security routine and an I/O unit for electronic communication with the controller and for RF communication with the communicator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.