Patents by Inventor Donald J. Liga

Donald J. Liga 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).

  • Interlocking cardboard spool assembly
    Patent number: 3958775
    Abstract: A spool or drum for holding flexible linear elements, such as cable, hose or long lengths of extruded plastic, is made up of three flat pieces of corrugated cardboard without glue or staples, one piece being the cylindrical body of the spool which is made by rolling up a cardboard sheet formed with suitable projections spaced along its edges, the other two pieces being disk-shaped with suitable spaced perforations to receive the spaced projections so as to hold the three elements securely together in the form of a spool.
    Type: Grant
    Filed: February 6, 1975
    Date of Patent: May 25, 1976
    Assignee: Kessler Products Co., Inc.
    Inventor: Donald J. Liga