Patents by Inventor Roberto F. Luna

Roberto F. Luna 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).

  • Alphanumeric quick symbol guide
    Patent number: 5707081
    Abstract: A symbol guide comprising a sheet and at least one pattern located on said sheet, the at least one pattern including two spaced apart substantially horizontal lines, two spaced apart substantially parallel lines positioned so that the substantially horizontal lines are located between the substantially parallel lines or extensions thereof; two substantially diagonally extending lines which cross each other in the space defined by the substantially horizontal lines, the substantially parallel lines and extensions thereof; and two substantially semi-circular curves facing each other and located within the space defined by the substantially horizontal lines, the substantially parallel lines and extensions thereof.
    Type: Grant
    Filed: May 13, 1996
    Date of Patent: January 13, 1998
    Inventor: Roberto F. Luna
  • Alphanumerica quick symbol guide
    Patent number: 5516152
    Abstract: An alphanumeric quick symbol guide is provided comprising a sheet and an array for forming on the sheet any letter of an alphabet, any number and any sign symbol for display purposes.
    Type: Grant
    Filed: August 26, 1994
    Date of Patent: May 14, 1996
    Inventor: Roberto F. Luna