Patents by Inventor John F. Kristofich

John F. Kristofich 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: 5168798
    Abstract: A portable rotisserie is disclosed which can be readily assembled and disassembled. The rotisserie includes front and back walls and two side walls each of which includes at its extremities complementary connecting means so that the walls can be assembled in the form of a rectangular frame. The front wall includes two plates between which are mounted a plurality of engaging idler gears and a drive gear for rotating the idler gears. Notches are provided in the upper surface of the plates of the front wall for receiving a sprocket gear attached to a skewer, the other end of which is supported in the back wall. A drive gear engages the idler gear so that when it is rotated, either manually or by motor, rotation of the idler gears causes the skewers mounted in the notches to rotate.
    Type: Grant
    Filed: September 24, 1991
    Date of Patent: December 8, 1992
    Assignee: Kristline Corporation
    Inventors: John F. Kristofich, Robert J. Kristofich
  • Patent number: 4624067
    Abstract: A versatile picture frame including a plurality of slidable arms connected to a back cover which engage a corresponding plurality of slots positioned along a skirt of the frame for quickly and easily securing an object to be displayed within the frame and for removing the same therefrom. The frame can also rest in a plurality of positions relative to a horizontal surface.
    Type: Grant
    Filed: December 7, 1983
    Date of Patent: November 25, 1986
    Inventor: John F. Kristofich
  • Patent number: 4562656
    Abstract: A picture frame hinge. The hinge is attached to backs of picture frames by inserting projections which extend from the hinge leaves into corresponding holes in the backs of the picture frames. The hinge is held in place by a resilient tab. The hinge contains opposing radial teeth which are resiliently biased together, and permit positive adjustment of the viewing angle of picture frames. A prop, for free standing is also provided.
    Type: Grant
    Filed: November 8, 1982
    Date of Patent: January 7, 1986
    Inventor: John F. Kristofich
  • Patent number: D276780
    Type: Grant
    Filed: December 9, 1982
    Date of Patent: December 18, 1984
    Inventor: John F. Kristofich