Portable communication device and system using the portable communication device and attachment for a portable communication device
US6885877B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 22, 1999 |
| Grant date | Apr 26, 2005 |
| Priority date | — |
| Expiry date | Jul 22, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07F7/1016
- WIPO fieldIT methods for management
- WIPO sectorElectrical engineering
Abstract
A portable communication device is used in a digital money system so as to pay for purchase by digital money by using the portable communication device. A remote communication interface interfaces radio-frequency communication with a remote communication terminal. A short-distance communication interface interfaces wireless communication with a communication terminal located in the vicinity of the portable communication device. Data or instruction information is input to the portable communication terminal by an inputting unit such as a key panel. The data is stored in a memory and is displayed on a display unit such as an LCD. An enciphering and deciphering circuit enciphers or deciphers the data to be transmitted or received so as to maintain security.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.