Patents by Inventor Natalya B. Dobrova

Natalya B. Dobrova 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).

  • Heart valve prosthesis
    Patent number: 4957503
    Abstract: A heart valve prosthesis has a valve ring (1) having an opening (2) for the flow of blood. A valve poppet (3) is mounted in the opening (2) for closing and opening it. An annular curvilinear depression (9) is provided on an upper or distal side (6) of the poppet (3) for reducing the poppet mass. The poppet (4) is floatingly mounted between support structures (4, 5).
    Type: Grant
    Filed: February 24, 1989
    Date of Patent: September 18, 1990
    Inventors: Alexandr S. Bukatov, Naum A. Iofis, Jury G. Egorov, Natalya B. Dobrova, Anatoly S. Kostretsov, Andrei V. Agafonov
  • Single warp-knitted pile fabric
    Patent number: 4805424
    Abstract: A single warp-knitted pile fabric comprising loop courses of ground and pile threads, wherein the loops of the pile threads are run jointly with the ground loops and interconnected by the floats of these loops. Transfers are run on from the pile threads in the same courses as the loops of these pile threads. The floats of the transfers are laid in some courses to overlie the floats of the ground loops, whereas in other courses the floats of the transfers are laid to underlie the floats of the ground loops.
    Type: Grant
    Filed: January 29, 1988
    Date of Patent: February 21, 1989
    Assignee: Vitebsky Tekhnologichesky Institut Legkoi Promyshlennosti
    Inventors: Alexandr V. Charkovsky, Natalya B. Dobrova, Vladimir N. Filatov, Naum A. Iofis, Alexandr S. Bukatov, Zinaida P. Danilova, Alexandr V. Kovarsky, Jury G. Egorov