System for the contactless exchange of data
CA 1300686 C · Owner: Venema, Willem H.J. · Inventors: Kip, Harm J.; Venema, Willem H.J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
TITLE: System for the contactless exchange of data. ABSTRACT A system for the contactless exchange of data between a transceiver and a passive data carrier is described. A prior data carrier comprises at least one digital memory and at least one digital control device for the memory. In it the data carrier has a single-coil receiver circuit connected to a controllable switch device. In operation the data carrier provides, in response to an electromagnetic a.c. field generated by a transceiver, via at least one rectifier,supply power for active components of the data carrier and clock signals for the control of digital components of the data carrier. According to the present invention in, …
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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 May 12, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 12, 2009.
- 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.