Antenna system for narrowband communications systems and method of operation
CA 2316809 A1 · Owner: Weblink Wireless, Inc. · Inventors: Hill, Selwyn; Angus, Allan D.; Jones, Graham K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is disclosed an improved base station (411) for communicating with communication units (121, 122) in a wireless messaging system (400). According to an advantageous embodiment, the base station comprises: 1) a transmitter (306) that is capable of transmitting messages to the communication units (121, 122) in a forward-channel having a first frequency range; 2) a receiver (307) that is capable of receiving messages from the communication units (121 122) in a reverse-channel having a second frequency range; and 3) an antenna (303) that is capable of transmitting the forward-channel messages (312) at a first angle of electrical downtilt below the horizon and receiving the …
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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 December 31, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 31, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 31, 2020.
- 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.