Information system for road traffic
CA 2315768 C · Owner: Koninklijke Kpn N.V. · Inventors: Schmidt, Johan Richard
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Information system for a traffic network (1). Information of importance to travellers is transmitted by a transmitter system (3) to data receivers (pagers) in vehicles (2) making use of the traffic network. The traffic network is broken down into information regions (6). The transmitter system transmits information modules (5) which each relate to an information region and which are characterised by a region-identification code (ID1 ID2 etc.). , The information system comprises means for transmitting upon entry by a , vehicle of an information region to the data receiver in said vehicle the region-identification code of said region the data receiver setting itself , using said …
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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 December 24, 1998 and granted October 21, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 24, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 24, 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.