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Johannes Kaulfuss

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  • Fredriksberg C, DK
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Patents Grantslast 30 patents

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

Patents Applicationslast 30 patents

  • 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

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