Transmission and reception apparatus for automobile
CA 1313694 C · Owner: Taniyoshi, Kiyoshi · Inventors: Takayama, Kazuo; Kondo, Toshihiko; Taniyoshi, Kiyoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An antenna element including a loading coil is composed so as to be expanded and contracted like a telescope upward from a housing tube. A characteristic impedance of a transmission line from a lower end part of this antenna element to a cable is equal to one of a cable. A part of the loading coil is reinforced. A branching filter which is set between the, antenna and a communication means using a different frequency band, suppresses a mutual interference between signals of communication means. An antenna circuit which is set between the, antenna or the branching filter and the communication means converts an impedance of a lower part in a frequency band and reduces a loss due to a …
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 February 16, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 16, 2010.
- 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.