Patents by Inventor Robert Van Ligten

Robert Van Ligten 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).

  • &lgr;/4 absorber with an adjustable band width
    Patent number: 6167985
    Abstract: &lgr;/4-absorber with an adjustable band width comprising at least one &lgr;/4-resonator (2) whose opening region (4) comprises a perforated head part (5). A further development of this &lgr;/4-absorber is provided with a soft and/or heat exchanging material (7) in the floor region (3).
    Type: Grant
    Filed: August 2, 1999
    Date of Patent: January 2, 2001
    Assignee: Rieter Automotive (International) AG
    Inventor: Robert Van Ligten