Patents by Inventor Marco Antonio Ferreira Cortes

Marco Antonio Ferreira Cortes 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).

  • Fretless grooved fingerboard
    Patent number: 6512168
    Abstract: A fingerboard for stringed musical instrument having a series of predetermined grooves located at every position in which a series of consecutive frets would have otherwise occurred, in accordance with a predetermined tonal scale, providing the facilities of a fretted fingerboard and maintaining the characteristics of a fretless fingerboard.
    Type: Grant
    Filed: April 20, 2001
    Date of Patent: January 28, 2003
    Inventor: Marco Antonio Ferreira Cortes
  • Fretgroove
    Publication number: 20010022128
    Abstract: A fingerboard for stringed musical instrument having a series of predetermined grooves located at every position in which a series of consecutive frets would have otherwise occurred, in accordance with a predetermined tonal scale, providing the facilities of a fretted fingerboard and maintaining the characteristics of a fretless fingerboard.
    Type: Application
    Filed: April 20, 2001
    Publication date: September 20, 2001
    Inventor: Marco Antonio Ferreira Cortes