Multi-frequency remote communications system
CA 2220480 A1 · Owner: Faltekval, Gerald · Inventors: Dyck, John; Janke, James; Gotowik, Horst
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to remote two-way data communication between units through the wall of a pipeline storage tank or other containment vessel. The efficient control of devices deployed within metal containment vessels such as pipelines or storage tanks is difficult without intrusion into the vessel by wires. Prior art systems have been limited in range and speed of data transfer. The present invention comprises a control unit located remote from the containment vessel and capable of two-way RF communication with a translator unit located on the outside of the containment vessel. The translator unit is capable of two-way RF communication with the control unit and two-way EM communication …
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 November 7, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 7, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 7, 2019.
- 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.