Patents by Inventor Alxei Vladimir Vinogradov

Alxei Vladimir Vinogradov 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
    Patent number: 5857027
    Abstract: The loudspeaker particularly comprises two-aperture radiator (1) containing paired in-phase counter-radiating apertures (4) and reproducing middle frequencies. Apertures (4) face each other, and their geometrical axis F is positioned vertically, while the distance between apertures (4) equals to at least the radius of aperture (4) but does not exceed the wavelength of the lowest frequency reproduced by paired apertures (4).
    Type: Grant
    Filed: April 15, 1996
    Date of Patent: January 5, 1999
    Inventors: Alexandr Sergeevich Gaidarov, Alxei Vladimir Vinogradov