Patents by Inventor Marcelo de Araújo Andrade

Marcelo de Araújo Andrade 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).

  • Cable comprising twisted metallic conductors with high electrical performance for use in digital systems
    Patent number: 7507909
    Abstract: A cable having twisted metallic conductors for use in digital systems. Twisted metallic conductor cable with high electrical performance for use in digital systems formed by a bundled array of insulated metallic conductors of thermoplastic material sheathed in a protective banding and by a metallic shielding and finally by a protective cover. The cable uses simultaneously a series of pitches having a maximum and minimum value between 10 and 80 mm and a conductor insulation with a thickness from 2.0 to 2.2 times the conductor diameter for a dielectric constant of 1.87. The combination of the special sequence of pitches and an adequate insulation thickness provides a decrease in attenuation and an improvement concerning the problem of cross talk in digital data transmission.
    Type: Grant
    Filed: March 14, 2003
    Date of Patent: March 24, 2009
    Assignee: Prysmian Telecomunicacoes Cabos E Sistemas Do Brasil S.A.
    Inventors: Renata Cidade Federighi, João Carlos Vieira Da Silva, Marcelo de Araújo Andrade