Digital dictation system with protection against unauthorized listening-in
US5835588A · kind A · utility
4Cited by
5References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 15, 1995 |
| Grant date | Nov 10, 1998 |
| Priority date | — |
| Expiry date | Aug 15, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C2207/16
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In the present state of the art, digital dictation machines with interchangeable semiconductor stores in the form of chip cards are known. The present invention describes a dictation system consisting of a mobile and stationary dictation machines in which the unauthorized listening-into dictated items is prevented by a code lock. The special nature of the coding of the machine and the code exchange between the chip card and the dictation machine is disclosed in particular. The code for a given machine configuration is established from a central reproduction station.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.