Audible warning of disembarked bus passengers
CA 2106142 C · Owner: Rose, Dean E. · Inventors: Rose, Dean E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An audible warning cue signal of a selected duration is provided to disembarked passengers to warn them of the impending departure of the vehicle from which they disembarked. The vehicle is stopped at a predetermined location for passenger debarkation. An entrance door of the vehicle is then actuated to an opened condition to allow the passengers to disembark. After the passengers have disembarked the door is actuated to a closed condition and an audibly perceptible alarm is provided for a selected time duration to aurally alert the disembarked passengers to the impending departure of the vehicle.
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 September 14, 1993 and granted December 11, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 14, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 14, 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.