High data capacity, scratch and dust resistant, infrared, read-write data card for automatic teller machines
US4500777A · kind A · utility
38Cited by
25References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 29, 1983 |
| Grant date | Feb 19, 1985 |
| Priority date | — |
| Expiry date | Dec 29, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S283/904
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A data card having an optical, high resolution reflective laser recording material, such as a metallic film adhered thereon. The strip of laser recording material has a capacity for recording at least 250,000 bits represented by bits having a dimension less than 50 microns. The data card is used in electronic passbook banking or identification uses.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.