Subnet addressable radio activated switch
US6927684B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Feb 6, 2003 |
| Grant date | Aug 9, 2005 |
| Priority date | — |
| Expiry date | Oct 9, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08C2201/42
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A remotely activated control device responsive to a specific transmitter operating in a frequency band assigned to radio telephone equipment, such as cellular telephone networks, cordless telephones, etc. The control device includes a radio receiver which provides a received pulse train to an assurance logic circuit. The assurance logic circuit determines if the received pulse train is limited to no more than a transmitter identification code and an action code, the combination of which is less than the code required to activate a relay network or initiate a radio telephone connection. Pulse trains accepted by the assurance logic circuit are compared to a stored code by a comparitor. The stored code includes the identification of a specific transmitter or group of transmitters and at least one action code. If the received pulse train matches the stored code, a switching circuit is activated to control a user supplied device.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.