Radio frequency identification tag apparatus and related method
CA 2343397 C · Owner: Google Technology Holdings Llc · Inventors: Vega, Victor Allen; Eberhardt, Noel H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A radio frequency identification device (100 200, 300, 350, 400, 500, 700), includes a substrate member (110) having a first surface (109) and a second surface (111). Disposed on the first surface of the substrate member are a first, antenna element (112) and a second antenna element (114). The first and second antenna elements are electrically isolated from each other and are coupled to two, separate pads on a circuit (116, 116'). The integrated circuit includes a power, circuit (814) that produces a supply voltage for electronics on the integrated circuit, in response to voltages coupled over the air to the pads on the integrated circuit, via the first and second antenna element. …
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 September 3, 1999 and granted March 11, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 3, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 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.