Patents by Inventor Ruben S. Cardozo

Ruben S. Cardozo 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).

  • Current transformer with plural part core
    Patent number: 5400006
    Abstract: A current transformer comprising a primary conductor means 20, secondary conductor means in the form of a first and second coil 21, 22 connected to ensure common-mode rejection of emf induced by external disturbing magnetic fields, and magnetic coupling means defined by first and second magnetic plates 23, 24 and first and second ferrite elements 25, 26 arranged within the first and second coils 21, 22, the elements 25, 26 contacting and physically separating the first and second plates 23, 24, thereby defining a closed magnetic circuit with the plates.
    Type: Grant
    Filed: April 23, 1993
    Date of Patent: March 21, 1995
    Assignee: Schlumberger Industries
    Inventor: Ruben S. Cardozo