Electromagnetic identification system
CA 1290841 C · Owner: Kip, Harm J. · Inventors: Fockens, Tallienco W.H.; Kip, Harm J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Title: Electromagnetic identification system. ABSTRACT: An electromagnetic identification system of the kind comprising a transmitter for generating an electromagnetic interrogation field in a detection zone at least one, passive responder capable of disturbing said interrogation field, and detection means for detecting a disturbance of the interrogation field caused by a responder. The responders comprise a single receiver circuit which in response to an interrogation field, via rectifier means can supply energy, to active digital encoding means comprising a binary-code defining means, and the encoding means is arranged in, operation, through a switch means, to vary the electrical …
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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
- Granted October 15, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 15, 2008.
- 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.