Patents by Inventor Cesare Valfre

Cesare Valfre 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).

  • Connecting device for telecommunication circuits, particularly for the sectioning thereof
    Patent number: 4017768
    Abstract: The invention concerns a device for connecting and sectioning telecommunication circuits, made of a fixed part and an insertable and disinsertable part, both parts carrying printed circuits coupled to each other by means of connectors and being provided with a set of conductors for connecting the device to incoming and departing leads.
    Type: Grant
    Filed: November 7, 1975
    Date of Patent: April 12, 1977
    Inventor: Cesare Valfre
  • Connecting device for telecommunication circuits
    Patent number: 4017770
    Abstract: Connecting device for telecommunication circuits, comprising a frame of insulating material shaped as a rectangle and having guiding grooves which may engage the edges of a movable board, carrying printed circuits and electric and/or electronic components so as to form a circuitry apt to process the signals arriving to the device.
    Type: Grant
    Filed: November 22, 1974
    Date of Patent: April 12, 1977
    Assignee: Applicazione Elettrotelefoniche SpA
    Inventor: Cesare Valfre
  • Negative impedance repeater with double amplification, for telephone lines
    Patent number: 3974345
    Abstract: A repeater for telephone lines, comprising two amplifier units serially connected and joined by an artificial line, the first unit having its input terminals connected to the secondary winding of a transformer of which the primary winding serves for connection of the repeater to the line, and the second unit having its output terminals connected to the primary winding of a second transformer of which the secondary winding is intended for connection of the repeater to the line.
    Type: Grant
    Filed: November 29, 1974
    Date of Patent: August 10, 1976
    Inventor: Cesare Valfre