Patents by Inventor John M. Gallas

John M. Gallas 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).

  • Trap for controlling standing waves in rooms
    Patent number: 5444198
    Abstract: This invention is an improved bass trap for controlling standing waves in the listening room. It is cylindrical in shape, with a curved diffuser around one half of the length of the cylinder. The interior of the cylinder is divided into two hemi-cylinders, with one hemi-cylinder made of an absorbing material positioned opposite the curved diffuser, and one hemi-cylinder, which is an air cavity, defined by the boundary of the absorbing material on one side and the diffuser on the other. This device features a ported top, with the ports positioned over the air cavity, which allow tuning pipes of varying length and diameter to be inserted, in order to permit further tuning of the device.
    Type: Grant
    Filed: January 4, 1994
    Date of Patent: August 22, 1995
    Inventor: John M. Gallas