Remote supervisory and controlling system
US4780872A · kind A · utility
21Cited by
4References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 12, 1986 |
| Grant date | Oct 25, 1988 |
| Priority date | — |
| Expiry date | Nov 12, 2006 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04Q9/14
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A remote supervisory and controlling system in which a central control unit generates a dummy transmission signal until receipt of an interruption signal from one of a plurality of input terminal units. In response to the interruption signal, the control limit accesses the input terminal generating the interruption signal, which returns its input data.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.