Reader/writer for contactless integrated circuit cards and management system for vending machines
US7543742B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 26, 2007 |
| Grant date | Jun 9, 2009 |
| Priority date | — |
| Expiry date | Jul 26, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07F9/026
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A handy reader/writer has a data transmitting and receiving units and a control unit. The transmitting and receiving units communicate with a contactless IC card placed within a communication area of the communicating unit by using first electromagnetic waves outputted from an antenna. The control unit judges whether or not the card is now in communication with a second reader/writer. If the control unit detects the card communicating with the second reader/writer by using second electromagnetic waves, the control unit forbids the antenna outputting the first electromagnetic waves. If the control unit does not detect the card communicating with the second reader/writer, the control unit starts communicating with the card placed. The second reader/writer does not output the second electromagnetic waves when detecting the first electromagnetic waves, and starts communicating with the card when detecting no first electromagnetic waves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.