Annunciator system with mobile receivers
CA 2259401 A1 · Owner: Hochstein, Peter A. · Inventors: Hochstein, Peter A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system for annunciating traffic information includes a plurality of stationary transmitters (42, 46) for generating relatively short range highly , directional beam signals (44, 48) containing a burst data stream signal (10) to each of a plurality of mobile receivers (50 52, 54). The stationary , transmitter (42) includes a transmitter (42a) connected to a transmitter antenna (56) for generating the beam signal (44) and to a transmitter control (60) which is connected to a transmitter memory (68) for storing a plurality of compressed data voice messages which are read by the transmitter control and generated as data packet signals (16 20, 22) in the burst data stream , signal (10). …
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 25, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 25, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 25, 2019.
- 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.