Device for detecting and signalling or indicating status as regards contents in a container, and in particular a letterbox
CA 2329972 A1 · Owner: Lie, Bjorn · Inventors: Lie, Bjorn
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for detecting and signalling or indicating status as regards contents in a, container, and in particular a letterbox comprising a detector for , registering a change of state in the letterbox, which registration is transmitted to and activates a preferably, remote display or the like in order to produce on the display a visual and/or audible, message which signals that contents have been deposited in said letterbox. The detector, is arranged in a preferably integrated mounting unit made in the form of an approximately U-shaped holder that accommodates a circuit board containing electronic, components, a light transmitter a light receiver, and wires and power supply which unit, …
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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 29, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 29, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 29, 2022.
- 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.