Patents by Inventor Rodolfo Di Pietro Elizaran

Rodolfo Di Pietro Elizaran 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).

  • Delayed action electrical protection device, depending on an adjusted magnitude
    Patent number: 4275445
    Abstract: The invention relates to an electrical protection device. According to the invention an adjusted signal is monitored to detect the presence of unwanted disturbances. A microprocessor is used to calculate a delay time for tripping in accordance with the comparison of this signal to calculated values within the microprocessor.
    Type: Grant
    Filed: April 5, 1979
    Date of Patent: June 23, 1981
    Assignee: Arteche, Instrumentacion y Systemas Electronicos, S.A.
    Inventor: Rodolfo Di Pietro Elizaran