Expanded quadruple-delta antenna structure
CA 2179331 C · Owner: Morton, Robert · Inventors: Podger, James Stanley
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An antenna structure is disclosed that is a set of approximately coplanar conductors which form four approximately triangular conductors. Three parallel conductors are the central part and the two outer parts. The centre points of these parallel conductors are aligned in the direction perpendicular to the parallel conductors. Connected to the central parallel conductor there are, four diagonal conductors which extend toward the outer parallel conductors and almost meet near the line of the centres of the parallel conductors. Extending from the unconnected ends of those diagonal conductors, there are four more diagonal conductors that connect to the outer parallel conductors. The two inner …
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 June 18, 1996 and granted December 1, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 18, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 18, 2018.
- 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.