Metal token having units of value stored therein using a single wire communication method
US5974504A · kind A · utility
9Cited by
13References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 15, 1998 |
| Grant date | Oct 26, 1999 |
| Priority date | — |
| Expiry date | Jul 15, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C11/41
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A secured metal token using a single wire communication system is employed to dispense units of value and to provide a secure storage device for controlling the dispensing of articles or service items. The metal token can be formed of two pieces with a simplified electronic circuit inside which can contain units of value for the dispensing of items using the memory within the metal token as a secure vault. The token uses a simple two wire (ground and combined clock/data) arrangment. As goods are purchased or services rendered the value of those good or services is deducted from a prestored amount within the token.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.