Patents by Inventor Cedric R. Bastiaans

Cedric R. Bastiaans 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).

  • Transducer with variable frequency response
    Patent number: 3999020
    Abstract: An audio transducer for a headphone includes ports which couple the rear of the transducer diaphragm to the interior of the cup. A resilient acoustic damping material is placed over the ports and is variably compressed by an adjustable clamp to provide a selectable frequency response curve. Two embodiments of the adjustable clamp are shown, as well as the coupling means which extends through an opening in the headphone cup to allow convenient adjustment by the user.
    Type: Grant
    Filed: October 29, 1975
    Date of Patent: December 21, 1976
    Assignee: Koss Corporation
    Inventors: Cedric R. Bastiaans, Joseph J. Chladil, Sr.