Patents by Inventor Charles J. Sealey

Charles J. Sealey 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).

  • Pattern voice coil loudspeaker with baffles touching diaphragm
    Patent number: 4156801
    Abstract: An electrodynamic loudspeaker has a diaphragm with a central driven area. Undriven areas of the diaphragm are baffled to minimize the effect of vibrations from the undriven areas which are out of phase with those in the central driven area.
    Type: Grant
    Filed: February 17, 1978
    Date of Patent: May 29, 1979
    Assignee: Strathern Audio Limited
    Inventors: Robert C. Whelan, Charles J. Sealey