Radio pbx for personal communications system
CA 2240153 A1 · Owner: Niki, Yoshiro · Inventors: Niki, Yoshiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A Radio PBX for use in a Digital Mobile Telephone system is provided. The Radio PBX includes a plurality of transceivers to transmit and receive RF signals to and from subscriber units and/or an external base station in which at least a set of transmitter and receiver is repeating those RF signals converting their frequencies and/or protocol, and said radio PBX is connected to one common indoor antenna and/or one common outdoor antenna. These transceivers have a capability to detect said RF signals into base band signals and modulated into new RF signals by interconnecting said base band signals between said transmitter and receiver. Moreover each transceiver is tailored and/or …
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 June 10, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 10, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 10, 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.