TREA

Robert J. Fretz

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  • Maplewood, MN, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Head direction hearing assist switching
    • Patent number 10,687,157
    • Issue date Jun 16, 2020
    • IntriCon Corporation
    • Robert J. Fretz
    • G06 - COMPUTING CALCULATING COUNTING
  • Information Patent Grant

    Feedback reduction for high frequencies
    • Patent number 10,499,165
    • Issue date Dec 3, 2019
    • IntriCon Corporation
    • Robert J. Fretz
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Hearing aid positioning system and structure
    • Patent number 9,571,939
    • Issue date Feb 14, 2017
    • IntriCon Corporation
    • Robert J. Fretz
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Ear contact pressure wave hearing aid switch
    • Patent number 8,767,987
    • Issue date Jul 1, 2014
    • IntriCon Corporation
    • Robert J. Fretz
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Hearing aid positioning system and structure
    • Patent number 8,605,927
    • Issue date Dec 10, 2013
    • IntriCon Corporation
    • Robert J. Fretz
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Switch for a hearing aid
    • Patent number 8,358,797
    • Issue date Jan 22, 2013
    • IntriCon Corporation
    • Robert J. Fretz
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Hearing aid circuit with feedback transition adjustment
    • Patent number 8,355,517
    • Issue date Jan 15, 2013
    • IntriCon Corporation
    • Robert J. Fretz
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Hearing aid body
    • Patent number D671218
    • Issue date Nov 20, 2012
    • IntriCon Corporation
    • Jean Elvira Daavettila
    • D24 - Medical and laboratory equipment
  • Information Patent Grant

    Hearing aid circuit reducing feedback
    • Patent number 7,519,193
    • Issue date Apr 14, 2009
    • Resistance Technology, Inc.
    • Robert J. Fretz
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Behind the ear hearing aid system
    • Patent number 7,027,608
    • Issue date Apr 11, 2006
    • GN ReSound North America
    • Robert J. Fretz
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Open ear canal hearing aid system
    • Patent number 6,275,596
    • Issue date Aug 14, 2001
    • GN ReSound Corporation
    • Robert J. Fretz
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Eartip for hearing aid
    • Patent number D424697
    • Issue date May 9, 2000
    • ReSound Corporation
    • Robert Fretz
    • D24 - Medical and laboratory equipment
  • Information Patent Grant

    Pair of hearing aid tubes
    • Patent number D420135
    • Issue date Feb 1, 2000
    • ReSound Corporation
    • Robert Fretz
    • D24 - Medical and laboratory equipment
  • Information Patent Grant

    Eartip for use as a hearing aid
    • Patent number D420136
    • Issue date Feb 1, 2000
    • ReSound Corporation
    • David Barnard
    • D24 - Medical and laboratory equipment
  • Information Patent Grant

    Receiver of amplitude modulated signals
    • Patent number 4,730,603
    • Issue date Mar 15, 1988
    • Minnesota Mining and Manufacturing Company
    • Robert J. Fretz
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE

Patents Applicationslast 30 patents

  • Information Patent Application

    Head Direction Hearing Assist Switching
    • Publication number 20190116434
    • Publication date Apr 18, 2019
    • IntriCon Corporation
    • Robert J. Fretz
    • G06 - COMPUTING CALCULATING COUNTING
  • Information Patent Application

    Feedback Reduction For High Frequencies
    • Publication number 20170332180
    • Publication date Nov 16, 2017
    • IntriCon Corporation
    • Robert J. Fretz
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Hearing Aid Positioning System And Structure
    • Publication number 20140105438
    • Publication date Apr 17, 2014
    • IntriCon Corporation
    • Robert J. Fretz
    • G06 - COMPUTING CALCULATING COUNTING
  • Information Patent Application

    Soft Concha Ring Behind-The-Ear Hearing Aid
    • Publication number 20120237068
    • Publication date Sep 20, 2012
    • IntriCon Corporation
    • Robert J. Fretz
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Hearing Aid Positioning System And Structure
    • Publication number 20120076336
    • Publication date Mar 29, 2012
    • IntriCon Corporation
    • Robert J. Fretz
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Ear Contact Pressure Wave Hearing Aid Switch
    • Publication number 20110142269
    • Publication date Jun 16, 2011
    • IntriCon Corporation
    • Robert J. Fretz
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Soft Concha Ring In-The-Ear Hearing Aid
    • Publication number 20110075871
    • Publication date Mar 31, 2011
    • IntriCon Corporation
    • Robert J. Fretz
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    SWITCH FOR A HEARING AID
    • Publication number 20100040239
    • Publication date Feb 18, 2010
    • IntriCon Corporation
    • Robert J. Fretz
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Method of manufacturing hearing aid ear tube
    • Publication number 20050190939
    • Publication date Sep 1, 2005
    • GN RESOUND NORTH AMERICA CORPORATION
    • Robert J. Fretz
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Hearing aid circuit reducing feedback
    • Publication number 20050047620
    • Publication date Mar 3, 2005
    • Resistance Technology, Inc.
    • Robert J. Fretz
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    BEHIND THE EAR HEARING AID SYSTEM
    • Publication number 20030002700
    • Publication date Jan 2, 2003
    • ROBERT J. FRETZ
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE