Dual mode filter
CA 1079369 A · Owner: Rca Limited · Inventors: Mok, Chuck K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Abstract of the Disclosure A dual mode filter, known in the art as a fourth order filter, has cylindrical coaxial input and output cavities that are connected through a coupling obstacle. The output of the dual mode filter is provided via a connector that carries a probe which extends within the end cavity. The input cavity supports a propagation therethrough of signals within a pass band of frequencies and within a parasitic band of frequencies. The diameter of the end cavity is smaller than the diameter of the input cavity, thereby causing the end cavity to suppress signals within the parasitic band. -1-
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
- Granted June 10, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 10, 1997.
- 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.