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Expired Canadian patentCanada

A hearing aid and a method of operating a hearing aid

CA 2625329 C · Owner: Kidmose, Preben · Inventors: Kidmose, Preben

CIPO record

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A hearing aid is provided which has at least one input transducer for providing an , input signal, at least one signal processing channel receiving at least a portion of , said input signal, a hearing aid processor for processing said portion of said input , signal to produce at least one output signal an output transducer responsive , to , said output signal and a data logger receiving said portion of said input signal for , logging of input signal data. The data logger comprises a characterisation unit for , characterising and logging parameters of the input signal data and a memory , unit , for storing said parameters.

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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 October 18, 2005 and granted July 23, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 18, 2025.
  • Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 18, 2005
GrantedJuly 23, 2013
Term endedOctober 18, 2025
Patent numberCA 2625329 C
Classification (IPC)H04R25/00

Timeline

Timeline From CIPO dates

2006200820102012201420162018202020222024Application filedOct 18, 2005Patent grantedJuly 23, 2013Term endedOct 18, 2025

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.