Patents by Inventor Siegfried Amft

Siegfried Amft 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).

  • Hifi-system
    Patent number: D998581
    Type: Grant
    Filed: July 7, 2020
    Date of Patent: September 12, 2023
    Assignee: T + A elektroakustik GmbH & Co. KG
    Inventor: Siegfried Amft