Hearing aid
CA 2099209 A1 · Owner: Siemens Audiologische Technik Gmbh · Inventors: Martin, Raimund
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In a hearing aid comprising an input transducer processing circuits for useful, signals including an output stage and an output transducer the useful signals are, sampled with a sampling frequency before the output stage are converted into data, words, and are also processed in discrete-time fashion. The digital data words are capable of being converted into pulse-duration-modulated signals without being reconverted into analog signals. For this purpose the processed data words can be read, into a counting circuit via at least one input which can be placed into an initial condition with counting pulses after every read-in data word. The output stage is designed as a switching amplifier and …
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 June 25, 1993. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 25, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 25, 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.