System and method employing portable cards to monitor a commercial system
US6317650A · kind A · utility
28Cited by
23References
104Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 29, 1999 |
| Grant date | Nov 13, 2001 |
| Priority date | — |
| Expiry date | Apr 29, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07F7/00
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A system and method employing portable cards, carried by consumers, to monitor a commercial system. In one exemplary embodiment, when a consumer uses a card at a vending machine, the vending machine may write data, reflecting a condition of the vending machine, onto the card. Subsequently, when the consumer uses the card at another machine, the other machine may read the condition data from the card.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.