Non-contact information medium and communication system utilizing the same
US6837438B1 · kind B1 · utility
199Cited by
5References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 29, 1999 |
| Grant date | Jan 4, 2005 |
| Priority date | — |
| Expiry date | Oct 29, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/07749
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a non-contact IC (integrated circuit) module having an IC chip and a coil, the non-contact IC module communicates with a terminal via a booster unit. A communication system extends a communication distance of data modulated by using a carrier frequency (sub-carrier frequency). A communication auxiliary apparatus is used in a communication between a non-contact information medium and an external appliance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.