Patents by Inventor Palo Krnan

Palo Krnan 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).

  • Loudspeaker with acoustic band-pass filter
    Patent number: 4875546
    Abstract: A loudspeaker having means for acoustically impeding excursion of the transducer diaphragm and means for acoustically attenuating the output of acoustic vibrations of frequencies above a preselected frequency. The loudspeaker includes first and second subchambers separated by a dividing wall in which the transducer is mounted. A first port acoustically couples the first subchamber with the second subchamber and a second port acoustically couples the second subchamber with the outside environment surrounding the loudspeaker.
    Type: Grant
    Filed: June 2, 1988
    Date of Patent: October 24, 1989
    Assignee: Teledyne Industries, Inc.
    Inventor: Palo Krnan