Electronic signature management system
US6307955A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 18, 1998 |
| Grant date | Oct 23, 2001 |
| Priority date | — |
| Expiry date | Dec 18, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/30
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An electronic signature management system includes a graphic tablet digitizer for signaling position coordinates of a stylus being moved to produce a handwritten signature, a clock circuit of the digitizer defining a fixed interval between successive stylus position measurements, a computer processor electrically interfaced with the tablet and programmed for receiving and storing a multiplicity of the coordinates in sequential order as an electronic signature forming a time history of the stylus movement. The computer is also programmed for verifying the fixed time intervals of the measurements, such as by comparing a ratio of total elapsed time and total number of the measurements with a standard measurement interval, and for comparing the electronic signature with a reference signature, such as by feeding a stored reference signature counterpart and the electronic signature into a cross-correlator for evaluating a degree of correspondence between respective time histories of the electronic signature and the reference signature. The signatures can also be compared visually in a simultaneous display wherein respective pointers follow the signatures orthogonally in response to an op…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.