Patents by Inventor Stephen Freels

Stephen Freels 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).

  • Computer installed stereo PA amplifier card
    Patent number: 8014544
    Abstract: The present invention is a stereo PA amplifier that is mounted inside a desktop computer. It is powered by the computer's 12-volt power supply and receives its input via a stereo mini cable from the computer's audio line out. Standard 8-ohm, non-powered speakers are then hooked up directly to the board via its speaker connector board. The volume of the present invention is adjusted by the computer's volume controls. The device eliminates the need for an external stereo amp and external mixer, which thereby reduces the installation time, cost, interconnecting cables, and the space needed for the overall computer system, while at the same time providing quality sound.
    Type: Grant
    Filed: September 4, 2007
    Date of Patent: September 6, 2011
    Inventors: Stephen Freels, Rick Calderon
  • Computer installed stereo PA amplifier card
    Publication number: 20090060221
    Abstract: The present invention is a stereo PA amplifier that is mounted inside a desktop computer. It is powered by the computer's 12-volt power supply and receives its input via a stereo mini cable from the computer's audio line out. Standard 8-ohm, non-powered speakers are then hooked up directly to the board via its speaker connector board. The volume of the present invention is adjusted by the computer's volume controls. The device eliminates the need for an external stereo amp and external mixer, which thereby reduces the installation time, cost, interconnecting cables, and the space needed for the overall computer system, while at the same time providing quality sound.
    Type: Application
    Filed: September 4, 2007
    Publication date: March 5, 2009
    Inventors: Stephen Freels, Rick Calderon