Method and arrangement for limiting the use of a display device
US6816974B1 · kind B1 · utility
9Cited by
7References
23Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1999 |
| Grant date | Nov 9, 2004 |
| Priority date | — |
| Expiry date | Nov 12, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B13/1418
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Use of an especially small-sized and valuable display device (b 31) is limited to persons knowing a password, not by any requirement that a password (33) always be entered when the display device (31) is switched on, but rather detecting, the detachment of the display device (31) from the equipment (35-39) controlling it and measuring its time of being detached, for limiting the use of the display device (31) on the basis of a certain predetermined and adjustable time limit which, when exceeded, requires the password be entered.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.