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Expired Canadian patentCanada

Mass production auditory canal hearing aid

CA 1297421 C · Owner: Voroba Technologies Associates A Partnership · Inventors: Voroba, Barry; Oberlander, Dennis A.

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

A new global, systematic approach has been taken to provide a better hearing aid and hearing aid delivery system. The in-the-canal hearing aid which is discussed and shown has patient selected physical components and patient selected electronic components. The construction of the hearing aid and the delivery system are such that a patient may personally select the best suited hearing aid during the testing process and walk away with the hearing aid he or she has personally selected. This is accomplished by allowing the patient to select a form fitting shell with a malleable covering having a hook and twist which precisely conforms to the patient's own ear. The patient then listens to sounds …

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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

  • Granted March 17, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 17, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 22, 1987
GrantedMarch 17, 1992
Term endedMarch 17, 2009
Patent numberCA 1297421 C
Classification (IPC)H04R25/00 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedMay 22, 1987Patent grantedMarch 17, 1992Term endedMarch 17, 2009

Sources & verification

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