Patents by Inventor Tom Liguori

Tom Liguori 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).

  • Ball-point pen device
    Patent number: 4311403
    Abstract: A ball-point pen has an outer housing containing an ink reservoir tube with a writing tip supported in a nose piece in the shape of a cone which is press-fitted thereon. The nose cone is provided with a rear extension having a cylindrical outer wall and an inner concentric cylindrical wall having a central through bore that receives the writing tip. The cylindrical walls define an annular space therebetween that has a bottom seat. The ink reservoir tube is provided with a central ink passage and the end of the tube is received in the annular space with the inner cylindrical wall of the nose piece received within the ink passage whereby the passage and the bore are in communication. The elements are sized so that the reservoir tube is press-fitted on the inner cylindrical wall of the nose piece and the outer cylindrical wall exerts a radially inwardly biasing force against the reservoir tube to maintain the reservoir tube tightly wedged against the inner cylindrical wall.
    Type: Grant
    Filed: March 26, 1980
    Date of Patent: January 19, 1982
    Assignee: National Pen Corporation
    Inventor: Tom Liguori
  • Pen
    Patent number: D325046
    Type: Grant
    Filed: February 13, 1989
    Date of Patent: March 31, 1992
    Assignee: National Pen Corporation
    Inventor: Tom Liguori
  • Writing instrument cap
    Patent number: D343196
    Type: Grant
    Filed: July 13, 1992
    Date of Patent: January 11, 1994
    Assignee: Modern Mold International
    Inventor: Tom Liguori