Paging receiver with continuously tunable antenna and rf amplifier
CA 2049969 A1 · Owner: Telefind Corporation · Inventors: Campana, Thomas J. Jr.; Andros, Andrew A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An RF paging receiver which is tunable to channels to receive pages with the pages being transmitted in a plurality of licensed frequency bands with each band containing a plurality of FM channels in which signal strength of pages on received channels in the bands varies as a result of variable antenna gain in accordance with the invention includes a tunable antenna (12 14) having a, reception bandwidth spanning the frequency bands with the antenna being tunable in response to an antenna tuning signal to achieve maximum antenna gain for a received channel in any one of the plurality of licensed frequency bands; an RF tuner (16) coupled to, the tunable antenna, for receiving individual …
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 March 26, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 26, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 26, 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.