Patents Assigned to National Chain Co.
  • Hollow, flanged earring post construction
    Patent number: 4307582
    Abstract: A precious metal post for pierced earrings comprising an elongated hollow tubular member having a gently rounded closed end at one extremity thereof, the opposite extremity being open and adapted for connection to an ornamental member. The outer diameter of the post is approximately 0.035 inches and the wall thickness is approximately 0.004 inches. A thin coating of solder-flux material is provided on the interior surface of the post to facilitate securement of the post to the ornamental member.
    Type: Grant
    Filed: March 17, 1980
    Date of Patent: December 29, 1981
    Assignee: National Chain Co.
    Inventor: William A. Mancini