Patents by Inventor Louis J. Danna

Louis J. Danna 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).

  • Patent number: 4258458
    Abstract: A blank for a stone setting comprising a base and prongs extending radially therefrom, said blank having a planar lower side and a notched upper side, the notches at the upper side defining at the junctions of the prongs with the base hinges which enable bending the prongs upwardly relative to the base to form a stone cage and at the distal ends thereof a seat for the stone and tangs for fixing the stone against the seat. A method of making a setting including making the blank by striking it from malleable sheet metal, removing parts of the sheet metal from around the bank, stripping the blank from the sheet metal, using a punch to force it into a die for bending the prongs and tangs at their notched areas to shape it into a cage. A further method of setting a stone by seating a stone against the seat at the top of the cage and bending the tangs against the stone.
    Type: Grant
    Filed: January 14, 1980
    Date of Patent: March 31, 1981
    Assignee: B. B. Greenberg Co.
    Inventor: Louis J. Danna
  • Patent number: 3992757
    Abstract: An adjustable side opening buckle for securing the tongue end of a watchband or the like to the buckle end of the band in which a frame forms a generally rectangular passage for receiving the buckle end of the band with a spring plate biased between the top of the frame and the upper surface of the band to urge one of a plurality of spaced notches in the underside of the band into engagement with a boss on the bottom of the frame adjustably to hold the buckle end in position on the frame and in which upwardly extending hooks spaced along the top of the frame are adapted to be received in slots in a tongue plate secured to the tongue end of the band and in which a cover supported on the frame for pivotal movement on an axis extending along one side of the frame is adapted to be moved from an open position to a closed position over the frame in which closed position it snaps into engagement with the frame to retain the tongue plate in engagement with the frame hooks.
    Type: Grant
    Filed: January 9, 1975
    Date of Patent: November 23, 1976
    Assignee: Kreisler Manufacturing Corporation
    Inventor: Louis J. Danna