Card for interaction with a computer
US7334735B1 · kind B1 · utility
93Cited by
120References
55Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 4, 1999 |
| Grant date | Feb 26, 2008 |
| Priority date | — |
| Expiry date | Oct 4, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06Q20/321
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A smart card comprising: a memory for storing information; at least one transmitting or receiving antenna; and a low frequency circuit, for handling information associated with said antenna and said memory, which information is modulated at a modulation frequency of between 5 kHz and 100 kHz. Preferably the antenna is an acoustic antenna.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.