Patents by Inventor Donald R. Levin

Donald R. Levin 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).

  • Scale
    Patent number: 4744428
    Abstract: A scale small enough and light enough to be carried in a person's pocket by virtue of the fact that most of its components are formed of lightweight molded plastic material. The fulcrum for the beam of the scale is provided by a pair of pointed, metal fulcrum posts adapted to cooperate with a pair of metal bearing inserts in the beam. A sliding weight which is movable along the beam has a metal insert to increase its weight and the metal insert is positioned in the plane of the fulcrum when the sliding weight is in its zero position.
    Type: Grant
    Filed: September 29, 1986
    Date of Patent: May 17, 1988
    Inventors: David G. Knotter, Donald R. Levin, Jody L. Numbers
  • Portable scale with cover
    Patent number: D359921
    Type: Grant
    Filed: May 12, 1994
    Date of Patent: July 4, 1995
    Assignee: Adams Apple Distributing L.P.
    Inventors: Alexander B. Robertson, Donald R. Levin