Secure over-the-air registration of cordless telephones
CA 2087841 C · Owner: D'Amico, Thomas V. · Inventors: Sharp, Ronald E.; D'Amico, Thomas V.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of registration of a portable unit that may be utilized in a communication system that comprises a network controller, having a data base for storing portable identification numbers a base station, and a portable unit, wherein a subscriber communicates to the network controller a first information set which comprises subscriber qualifying information the portable, identification number, and a key code that has been entered into the portable (100) and wherein the subscriber has entered a link identification number for over-the-air registration into a memory within the portable unit (102).
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 August 2, 1991 and granted September 23, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 2, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 2, 2013.
- 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.