Method for detecting living human skin
US6597945B2 · kind B2 · utility
18Cited by
1References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jan 9, 2001 |
| Grant date | Jul 22, 2003 |
| Priority date | — |
| Expiry date | Apr 20, 2021 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/1172
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A characteristic curve of the impedance of a skin surface is measured as a function of the frequency of an electric AC voltage by applying the voltage to at least one electric conductor which is galvanically or capacitively coupled to the skin surface. The characteristic curve is compared with a reference characteristic curve, which has been generated previously. If the characteristic curve substantially corresponds to the reference characteristic curve, the skin surface is recognized as belonging to living tissue.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.