Patent · US Expired

Method and apparatus for non-contacting information transmission

US4876535A · kind A · utility

42Cited by

6References

7Claims

0Family size

Assignee

Zeiss Ikon AG · DE

Inventors

Horst Ballmer · Heidenheim, DE
Rudolf Grosskopf · Königsbronn, DE

Key dates

Filing date	Sep 8, 1987
Grant date	Oct 24, 1989
Priority date	—
Expiry date	Sep 8, 2007

Classification

Technology area (CPC H)Electricity
CPC primaryH01F2038/146
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

An apparatus for non-contacting information transmission between a data carrier and a data reader includes providing at least two electrodes on the surface of the data carrier which are brought together which at least two electrodes in the data reader to form capacitors to produce at least one common circuit of the data carrier and data reader for information transmission.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.