Door chime assembly and method
CA 2411708 C · Owner: Broan-Nutone Llc · Inventors: Albritton, Charles W.; Roell, Robb R.; Mcdonald, Richard G.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Some embodiments of the present invention enable a user to select from different, appearances and sound types by providing different door chime assembly housing covers. The, housing covers can be different in shape size, appearance, and/or acoustic , property and, preferably can be releasably mounted on a housing base. A door chime assembler, manufacturer, or, user can therefore select from different door chime assembly appearances and acoustic properties, by selecting one of two or more different housing covers. The door chime assembly can employ, a number of different features that change the sound quality of the door chime assembly, including a domed or tented housing cover shape a …
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 November 13, 2002 and granted July 10, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 13, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 13, 2024.
- 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.