Aural warning system for buses
CA 2426897 A1 · Owner: Zimmerman, Harold B. · Inventors: Zimmerman, Harold B.; Zimmerman, Jay
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An aural warning system for buses (16) is provided which comprises a logic controller, circuit board (10) in electrical communication with an audible alarm (14). The logic, controller circuit board (10) actuates the audible alarm (14) in a preprogrammed response to, input data. The input data is provided by one or more loading lights (56) which send an, on/off signal to the logic controller circuit board (10) a speed sensor (22) , which provides, information as to the speed of the bus to the logic controller circuit board (10), and an, open/closed switch (26) providing information regarding the open/closed status of one or, more doors (28) of the bus (16). The preprogrammed response …
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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 April 16, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 16, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 16, 2025.
- 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.