Remote reading thermostat
US4864274A · kind A · utility
14Cited by
7References
11Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 24, 1988 |
| Grant date | Sep 5, 1989 |
| Priority date | — |
| Expiry date | Oct 24, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D23/1905
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An information transmission system using a pair of transmission interconnections to supply power from a collection station to an operating station, and to transmit information back based on the collection station providing a changing voltage on the two interconnections and the operating station modulating the amount of current drawn about a reference current to represent information.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.