Multi-port microwave coupler
CA 2073803 C · Owner: Tondryk, Wieslaw Jan · Inventors: Tondryk, Wieslaw Jan
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A multi-port microwave coupler has six input ports In 1, In 2, In 3, In 4, In 5 and In 6 and six output ports Out 1, Out 2, Out 3, Out 4, Out 5 and Out 6 and is synthesised from nine 2 x 2 90° hybrid couplers which are arranged as three sets, that is a first set A, B and C a second set D, E and F and a third set G H and I. A first group of, transmission lines 11 12, 13, 14, 15 and 16 interconnect, the first and second sets of hybrid couplers and a second, group of transmission lines 21 22, 23, 24, 25 and 26, interconnect the second and third sets of hybrid couplers. The first and third sets of couplers each give a 3dB power reduction, but the second set give a 1:2 power split between their …
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 July 14, 1992 and granted September 17, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 14, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 14, 2014.
- 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.