Directional waveguide finline coupler
CA 2003579 C · Owner: Motorola, Inc. · Inventors: Kane, Robert C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A waveguide coupler for coupling energy from one waveguide to another, using a finline mode coupler. The coupler uses a mode converter which changes the propagation mode in a waveguide from waveguide mode to finline mode. Finline mode waves are coupled into an adjacent waveguide via a slot in a wall common to both, waveguides wherein lies a finline coupler. After the finline mode waves are coupled into the adjacent waveguide the finline mode, converter reconverts the finline mode propagation to waveguide mode.
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 November 22, 1989 and granted October 26, 1993. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 22, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 22, 2011.
- 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.