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Axel Grell

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  • Burgdorf, DE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Headphone
    • Patent number 10,477,293
    • Issue date Nov 12, 2019
    • Sennheiser electronic GmbH & Co. KG
    • Axel Grell
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Headphone unit
    • Patent number 10,178,465
    • Issue date Jan 8, 2019
    • Sennheiser electronic GmbH & Co. KG
    • Axel Grell
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Method of controlling an audio amplifier unit and audio amplifier unit
    • Patent number 10,128,806
    • Issue date Nov 13, 2018
    • Sennheiser electronic GmbH & Co. KG
    • Alexander Grimm
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Grant

    Methods and devices for reproducing surround audio signals
    • Patent number 9,918,179
    • Issue date Mar 13, 2018
    • Sennheiser Electronic GmbH & Co., KG
    • Markus Kuhr
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Methods and devices for reproducing surround audio signals
    • Patent number 9,635,484
    • Issue date Apr 25, 2017
    • Sennheiser electronic GmbH & Co. KG
    • Markus Kuhr
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Headphone and headset
    • Patent number 9,247,337
    • Issue date Jan 26, 2016
    • Sennheiser electronic GmbH & Co. KG
    • Hatem Foudhaili
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Methods and devices for reproducing surround audio signals
    • Patent number 8,885,834
    • Issue date Nov 11, 2014
    • Sennheiser electronic GmbH & Co. KG
    • Markus Kuhr
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Dynamic sound transducer and receiver
    • Patent number 8,731,231
    • Issue date May 20, 2014
    • Sennheiser electronic GmbH & Co. KG
    • Till Teske-Fischer
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Receiver
    • Patent number 8,363,874
    • Issue date Jan 29, 2013
    • Sennheiser electronic GmbH & Co. KG
    • Axel Grell
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Headphones and headset
    • Patent number 8,295,530
    • Issue date Oct 23, 2012
    • Sennheiser electronic GmbH & Co. KG
    • Axel Grell
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Electroacoustic transducer
    • Patent number 8,215,445
    • Issue date Jul 10, 2012
    • Sennheiser electronic GmbH & Co. KG
    • Jens Wildhagen
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Converter system for an active noise compensation apparatus
    • Patent number 8,180,092
    • Issue date May 15, 2012
    • Sennheiser electronic GmbH & Co. KG
    • Axel Grell
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Grant

    Wire-free headset, portable media player
    • Patent number 8,103,015
    • Issue date Jan 24, 2012
    • Sennheiser electronic GmbH & Co. KG
    • Rolf Meyer
    • G11 - INFORMATION STORAGE
  • Information Patent Grant

    Headphone set
    • Patent number 7,940,947
    • Issue date May 10, 2011
    • Sennheiser electronic GmbH & Co. KG
    • Johannes Kaulfuss
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Headphones
    • Patent number 7,639,832
    • Issue date Dec 29, 2009
    • Sennheiser electronic GmbH & Co. KG
    • Wolfgang Mann
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Headphones
    • Patent number 7,292,703
    • Issue date Nov 6, 2007
    • Sennheiser electronic GmbH & Co. KG
    • Johannes Kaulfuss
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Headphone
    • Patent number 7,162,051
    • Issue date Jan 9, 2007
    • Sennheiser electronic GmbH & Co. KG
    • Axel Grell
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Grant

    Closed headphones with transducer system
    • Patent number 6,934,401
    • Issue date Aug 23, 2005
    • Sennheiser electronics GmbH & Co. KG
    • Axel Grell
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE

Patents Applicationslast 30 patents

  • Information Patent Application

    SYSTEM AND METHOD OF CONTROLLING LOUDNESS OF AN ELECTROACOUSTIC TRA...
    • Publication number 20250008266
    • Publication date Jan 2, 2025
    • HEAVYS INC.
    • Axel GRELL
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Headphone
    • Publication number 20180249237
    • Publication date Aug 30, 2018
    • SENNHEISER ELECTRONIC GMBH & CO. KG
    • Axel Grell
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Method of Controlling an Audio Amplifier Unit and Audio amplifier Unit
    • Publication number 20180013394
    • Publication date Jan 11, 2018
    • SENNHEISER ELECTRONIC GMBH & CO. KG
    • Alexander Grimm
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Application

    METHODS AND DEVICES FOR REPODUCING SURROUND AUDIO SIGNALS
    • Publication number 20170180907
    • Publication date Jun 22, 2017
    • SENNHEISER ELECTRONIC GMBH & CO. KG
    • Markus Kuhr
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Headphone Unit
    • Publication number 20170180845
    • Publication date Jun 22, 2017
    • SENNHEISER ELECTRONIC GMBH & CO. KG
    • Axel Grell
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    HIFI AUDIO TUBE AMPLIFIER
    • Publication number 20170085227
    • Publication date Mar 23, 2017
    • SENNHEISER ELECTRONIC GMBH & CO. KG
    • Dirk Krätzer
    • H03 - BASIC ELECTRONIC CIRCUITRY
  • Information Patent Application

    Headphone and Headset
    • Publication number 20150030173
    • Publication date Jan 29, 2015
    • SENNHEISER ELECTRONIC GMBH & CO. KG
    • Hatem Foudhaili
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    METHODS AND DEVICES FOR REPRODUCING SURROUND AUDIO SIGNALS
    • Publication number 20140334650
    • Publication date Nov 13, 2014
    • Markus Kuhr
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    HEADPHONES AND HEADSET
    • Publication number 20110164775
    • Publication date Jul 7, 2011
    • SENNHEISER ELECTRONIC GMBH & CO. KG
    • AXEL GRELL
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    METHODS AND DEVICES FOR REPRODUCING SURROUND AUDIO SIGNALS
    • Publication number 20110135098
    • Publication date Jun 9, 2011
    • SENNHEISER ELECTRONIC GMBH & CO. KG
    • Markus Kuhr
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Electroacoustic Transducer
    • Publication number 20110031061
    • Publication date Feb 10, 2011
    • Sennheiser Electronic GmbH & Co. KG
    • Jens Wildhagen
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Receiver
    • Publication number 20110007930
    • Publication date Jan 13, 2011
    • SENNHEISER ELECTRONIC GMBH & CO. KG
    • Axel Grell
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    DYNAMIC SOUND TRANSDUCER AND RECEIVER
    • Publication number 20100183173
    • Publication date Jul 22, 2010
    • Sennheiser Electronic GmbH & KG
    • Till Teske-Fischer
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Converter System for an Active Noise Compensation Apparatus
    • Publication number 20090136055
    • Publication date May 28, 2009
    • Axel Grell
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Application

    Headset with Active Noise Compensation
    • Publication number 20090103745
    • Publication date Apr 23, 2009
    • Axel Grell
    • A61 - MEDICAL OR VETERINARY SCIENCE HYGIENE
  • Information Patent Application

    Wire-Free Headset, Portable Media Player
    • Publication number 20090022334
    • Publication date Jan 22, 2009
    • Rolf Meyer
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Headphones
    • Publication number 20080049963
    • Publication date Feb 28, 2008
    • SENNHEISER ELECTRONIC GMBH & CO. KG
    • Wolfgang Mann
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Acoustic Transducer
    • Publication number 20080008347
    • Publication date Jan 10, 2008
    • Claus-Peter Hinke
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Headphone set
    • Publication number 20070297633
    • Publication date Dec 27, 2007
    • Sennheiser Electronic GmbH & Co. KG
    • Johannes Kaulfuss
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Headphone
    • Publication number 20070258608
    • Publication date Nov 8, 2007
    • Wolfgang Neihoff
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Headphones
    • Publication number 20050244027
    • Publication date Nov 3, 2005
    • Johannes Kaulfuss
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Headphone
    • Publication number 20040156521
    • Publication date Aug 12, 2004
    • Axel Grell
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE
  • Information Patent Application

    Closed headphones with transducer system
    • Publication number 20030039375
    • Publication date Feb 27, 2003
    • Sennheiser Electronic GmbH & Co. KG
    • Axel Grell
    • H04 - ELECTRIC COMMUNICATION TECHNIQUE