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US4425481B1 Expired / Lapsed US ⏱️ 0.0 years remaining

Programmable signal processing device

Assignee: GN Hearing Care Corp
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Filing: 1982-04-14
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Granted: 1994-07-12
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Expires: 2002-04-14
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Abstract

Abstract Programmable signal processing device mainly intended for hearing aids and of the kind which includes an electronically controlled signal processor, the device being able to select a number of different signal processes to suit different sound situations automatically or by the user himself. This is accomplished by a memory (6) arranged to store information data for at least two unique signal processes adjusted to different sound environment/listening situations and a control unit (5), manual or automatic, arranged to transmit information data for one of the unique signal processes from the memory (6) to the signal processor (4) to bring about one signal process adjusted to a particular sound environment/listening situation.

Inventors

  • 👤 Stephan Mansgold
  • 👤 Arne Leijon
  • 👤 Bjoern Israelsson

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-28 11:50
CPC Classifications
H; H04; H04R; H04R25/00; H04R25/50; H04R25/505; H04R2225/00; H04R2225/41; H04R2225/43; H04R25/35; H04R25/356; H04R25/43

Claims Analysis

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References Cited (Backward Citations)

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USPTO Annuity & Maintenance Windows

Annuity Stage Window Opens Payment Deadline Surcharge Period Until Estimated Fee Status
3.5 Years (Year 4) 1997-07-11 1998-01-10 1998-07-12 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2001-07-11 2002-01-10 2002-07-12 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2005-07-11 2006-01-10 2006-07-12 $7700.00 Window Closed / Lapsed

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