Patents by Inventor Guiseppe Giannantonio

Guiseppe Giannantonio 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).

  • Device to shield mask cathode tubes from the earth's magnetic field
    Patent number: 4940920
    Abstract: To improve the trichromatic cathode tube shielding effect given by the frame-mask set and by a shielding material made with material of low magnetic permeability, the external conductors of a de-magnetization coil with two loops are made to pass in front of the fastening lugs and not behind the frit plane as was the case before, and the position of the internal conductors is set to obtain the best compromise.
    Type: Grant
    Filed: November 6, 1987
    Date of Patent: July 10, 1990
    Assignee: Videocolor
    Inventors: Guiseppe Giannantonio, Cesare de Paolis
  • Process and apparatus for the rapid adjustment of the static convergence and purity in a television tube, by using a permanent magnet
    Patent number: 4636694
    Abstract: Process for adjusting the static convergence and/or purity of a color television tube by using a magnetic ring surrounding the neck of the tube and coils creating in this ring induction poles of values selected to carry out the adjustment. To the terminals of each coil a current impulse is applied conferring on the remanent induction an important value higher than that necessary to carry out the correction; then a current impulse is applied in the opposite direction effecting a partial demagnetization in such a way that the remanent induction allows the desired adjustment.
    Type: Grant
    Filed: October 30, 1985
    Date of Patent: January 13, 1987
    Assignee: Videocolor
    Inventors: Cesare De Paolis, Guiseppe Giannantonio, Claude Pons