Patents by Inventor Enzo Longobardi

Enzo Longobardi 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).

  • Method and apparatus for forming fibre optic attenuators with spectral response independent of the wavelength
    Patent number: 5742725
    Abstract: A fibre optic attenuator (201) with spectral response independent of the incident radiation wavelength is formed by a method comprising a controlled series of compressive stressing and subsequent relaxation, or of relaxation alone, of the core of an optical fibre (30) (which can be of standard type or special type), which is simultaneously softened by local heating produced by a heat source. The application of further heating, in the absence of mechanical stressing of the deformed optical fibre (30), facilitates the attainment of the required attenuation.
    Type: Grant
    Filed: December 16, 1996
    Date of Patent: April 21, 1998
    Assignee: Optotec S.p.A.
    Inventors: Enzo Longobardi, Lucio Duca, Antonio Menzaghi