Communication system with call charge information stored in handset
CA 2102402 C · Owner: Motorola, Inc. · Inventors: Barnes, Nigel Everard; Warwick, Gerald Anthony
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A communication system, such as a telepoint system is, provided comprising at least one base station (10) and at, least one handset (11) having means for setting up a call over a radio channel with the base station and having means for receiving an over-the-air registration sequence from the base station and storing a number (TRD) in non-volatile memory (20) dependent on the over-the-air registration sequence. The base station has metering means (13) for metering charge units accrued during the call between the base station and the handset. Means (14) are provided at the base station for automatically generating a new over-the-air registration sequence to be sent to the handset in response …
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 March 18, 1993 and granted May 6, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 18, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 18, 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.
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.