Spiral-antennae system
CA 2023210 C · Owner: Maury, Laurent · Inventors: Maury, Laurent
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The antenna device comprises, on a substrate a plurality of radiating elements and one pair of input terminals for high frequency electrical signals for each of the said elements. Each of the said radiating elements comprises a spiral portion (SPi) and has an extension (PB1i, PB2i) of the stems of its spiral having geometric characteristics different from those of the said spiral to form for example a peripheral crown (CP) around the latter.
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 August 14, 1990 and granted November 16, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 14, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 14, 2012.
- 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.