Process for promotion of pay television broadcasts, and device for use of the process
US5199067A · kind A · utility
2Cited by
5References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 10, 1990 |
| Grant date | Mar 30, 1993 |
| Priority date | — |
| Expiry date | Dec 10, 2010 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N21/2543
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The process of the invention concerns pay television networks with reinforced scrambling. To attract potential subscribers, the invention consists in cyclically transmitting non-scrambled images for brief periods, so that the type of program can be seen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.