Enhanced wireless packet data communication system, method, and apparatus applicable to both wide area networks and local area networks
CA 2704030 C · Owner: Brown, Michael R. · Inventors: Naden, Gary A.; Sanderford, H. Britton; Reed, Marc L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A cellular wireless packet data communication system containing transmit-only endpoint device (HA40 HA50) which transmit to receive-only base stations (B1 B2, BN). The system is configured to allow for large area coverage (e.g. a metropolitan area) with far fewer number base stations than are required with conventional two-way cellular systems. The base station coverage areas are configured to overlap allowing for reception of packets at multiple base stations. A data concentrator (HA60) resolves redundantly received messages. The network is configurable as a WAN a LAN, or a combination of the two. Novel modulation techniques (e.g. a 16QAM submodulation together with a 7FSK modulation) are …
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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 March 29, 2002 and granted January 27, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 29, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 29, 2024.
- 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
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.