Patents by Inventor Chang-Chin Hwang

Chang-Chin Hwang has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Transmitter for a headphone
    Patent number: D731997
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: June 16, 2015
    Assignee: Sennheiser electronic GmbH & Co. KG
    Inventors: Joerg Brennwald, Chang-Chin Hwang
  • Headphones
    Patent number: D741286
    Type: Grant
    Filed: June 20, 2013
    Date of Patent: October 20, 2015
    Assignee: Sennheiser electronic GmbH & Co. KG
    Inventors: Joerg Brennwald, Chang-Chin Hwang