Wireless response device, image forming apparatus, and equipment
US7515046B2 · kind B2 · utility
2Cited by
10References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 6, 2006 |
| Grant date | Apr 7, 2009 |
| Priority date | — |
| Expiry date | Jun 28, 2026 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01Q1/2208
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A wireless response device comprises an antenna that receives a question signal, an identification signal generating unit that generates a response signal for a question signal received by the antenna, and that operates passively, and an impedance conversion unit provided between the antenna and the identification signal generating unit, whose impedance changes in response to the state of the environment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.