TREA

Dirk Krätzer

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  • Hannover, DE
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Patents Grantslast 30 patents

  • Information Patent Grant

    Rechargeable battery unit and portable electronic appliance
    • Patent number 9,184,474
    • Issue date Nov 10, 2015
    • Sennheiser electronic GmbH & Co. KG
    • Dirk Reymann
    • H02 - GENERATION CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • Information Patent Grant

    Accumulator
    • Patent number D626504
    • Issue date Nov 2, 2010
    • Sennheiser electronic GmbH & Co. KG
    • Alexander Gruve
    • D13 - Equipment for production, distribution, or transformation of energy

Patents Applicationslast 30 patents