IC card
US6173900A · kind A · utility
15Cited by
1References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 27, 1999 |
| Grant date | Jan 16, 2001 |
| Priority date | — |
| Expiry date | Oct 27, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/07796
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An object of the present invention is able to provide an IC card in which for example, even if a state should occur in which a plurality of IC cards are piled up in any direction for use, a received signal is not greatly lowered but a normal usage pattern is secured. When the IC cards are piled up with the contours united, a projection drawing of an antenna of one IC card to an antenna surface of the other IC card has an area not overlapped at least 15% or more of an area having an antenna to the other antenna surface on the projection surface and the IC card can work.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.