Patents by Inventor d'Auria Luigi

d'Auria Luigi 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).

  • Optical attenuator providing controlled attenuation
    Patent number: 4378490
    Abstract: The real attenuation produced by the optical attenuator is determined by means of photodetectors which carry out continuous measurement of the intensity of an auxiliary beam before and after it passes through the attenuator element. Signals which are emitted by the photodetectors and are proportional to the intensity received are transmitted to an electronic processing system which computes and displays the attenuation in decibels.
    Type: Grant
    Filed: November 18, 1980
    Date of Patent: March 29, 1983
    Assignee: Thomson-CSF
    Inventor: d'Auria Luigi