Method and apparatus for performing inbound calling in a wireless communication system having fixed communication units coupled to a telephone system by a telephone line shared in common
CA 2135791 C · Owner: Pickert, William Fredrick · Inventors: Pickert, William Fredrick
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method and apparatus handles an incoming call and performs hand-off in a wireless communication system including a portable communication unit (PCU(120) having a PCU identification code, and fixed communication units (FCUs (102) having radio coverage areas (108 110, 112), associated therewith. The FCUs (102) are coupled to a telephone system (114) by a telephone line (116) shared in common by the FCUs (102) for handling calls to and from the PCU (120), and the PCU (120) is associated with the telephone line (116) for receiving the incoming call. The FCUs (102) are coupled to the telephone line (116) in response to the incoming call, and signals are transmitted thereafter from the FCUs …
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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 May 12, 1993 and granted April 18, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 12, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 12, 2015.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.