Multi-dimensional electronic identification of articles
CA 2321674 A1 · Owner: Hodson, Trevor Meredith · Inventors: Hodson, Trevor Meredith; Marsh, Michael John Camille
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An identification system is provided for identifying a plurality of randomly aligned object-based transponders (18, 20 22) passing through a predetermined , reading volume. A reader (10) includes multiple transmitting and receiving antenna arrays (12, 14, 16) which are arranged sequentially to transmit interrogating and energising fields (29) into the reading volume with each , energising field having a different polarisation. Each transponder (12 14, 16) is arranged to be powered by at least one of the interrogating and energising fields, and includes a short term memory module (30) which is arranged to record the successful transmission or otherwise of the identification signal of …
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 March 3, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 3, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 3, 2021.
- 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.