Patents by Inventor Frank H. Hart

Frank H. Hart 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).

  • Loud speaker system
    Patent number: 4967872
    Abstract: A sound diffuser assembly for use with a compressive driver. The sound diffuser assembly has a sound reflector for receiving and redirecting sound energy from the compressive driver. A sound diffuser having a plurality of curved shaped concentric rings is also provided and positioned to receive reflected sound energy and to direct the sound energy in a predetermined pattern. Mounting apparatus is further provided to mount the compressive driver to the assembly so that sound energy from the compressive driver is directed into the sound reflector.
    Type: Grant
    Filed: June 19, 1989
    Date of Patent: November 6, 1990
    Assignee: F. H. Hart Engineering Co., Inc.
    Inventor: Frank H. Hart