Transmission of protection commands to a remote tripping device
CA 2528769 C · Owner: Abb Technology Ag · Inventors: Strittmatter, Michael
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is concerned with the transmission of protection commands to a remote tripping device over an analog signal link with a limited number of tones or frequencies (F1 F2, F3, F4). Different operating principles involve a number of frequency detectors (41 42, 43, 44) depending on the number of commands (A B, C, D) that are to be transmitted either alone or in combination. In order to transmit a maximum number of protection commands with a minimum number of tones/detectors two of the abovementioned distinct operating principles are assigned at least one common tone. A prioritizing mechanism is established for preferring certain related protection commands belonging to a …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed December 2, 2005 and granted August 12, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 2, 2025.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.