Combiner arrangement in a radio base station
CA 2007242 C · Owner: Kagstrom, Leif Sture · Inventors: Kagstrom, Leif Sture
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A combiner arrangement in a radio base station includes a number of waveguide cavity resonators operating as channel filters. According to the invention, each resonator is divided into two substantially equal cavity resonator parts. One base station transmitter is connected to one of the resonator parts and another is connected to the other resonator part. The decoupling of a resonator is effected by two clamp-like elements situated at the center of the resonator. The coaxial connection to the antenna consists of coaxial bales between the resonators. All the resonators are connected in series with the antenna.
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 January 5, 1990 and granted November 1, 1994. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 5, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 5, 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.