Apparatus and method for marker verification
US4686515A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 1985 |
| Grant date | Aug 11, 1987 |
| Priority date | — |
| Expiry date | Apr 25, 2005 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06K19/067
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An apparatus and method are provided for product verification wherein a verification marker attached to the product produces a signal identified by a disguised scanning code and matched to a visible code indicia on the product. The signal from the marker is in response to a known applied interrogation field generated by a scanning unit. The scanning unit is portable and includes a detector for the response signal. An EPROM processes the response signal and generates the scanning code. The programming is such that the code is random and different for each manufacturer/product and corresponds to the visible code indicia. The marker includes an amorphous metal ribbon having a known magnetomechanical vibration characteristic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.