Patents by Inventor Stephen R. Langford

Stephen R. Langford 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: 5004058
    Abstract: A multiple load-cell weigh scale (10) is disclosed which provides for substantially enhanced accuracy and significantly greater convenience in compensating for load position. The preferred scale (10) includes a platform (12) supported by plurality of digital load cells (14), a central controller (16) for producting a plurality of digital excitation signals representative of a selected excitation voltage for the respective load cells, and an excitation control unit (22) for each load cell for receiving respective excitation signals and for controlling excitation voltage of an associated load cell (20) in accordance therewith.
    Type: Grant
    Filed: March 27, 1990
    Date of Patent: April 2, 1991
    Assignee: Cardinal Scale Manufacturing Company
    Inventors: Stephen R. Langford, James R. Stone, William C. Bagley
  • Patent number: 4825966
    Abstract: A weigh scale having a unique display is provided which allows rapid, accurate, and convenient determination of the weight of an object to the nearest discrete fractional portion of a weight unit. The preferred weight unit includes a digital display for the object in whole ounces and four light-emitting indicators, one of which illuminates to indicate the object's fractional weight to the nearest quarter-ounce.
    Type: Grant
    Filed: January 12, 1988
    Date of Patent: May 2, 1989
    Assignee: Cardinal Scale Manufacturing Company
    Inventors: Stephen R. Langford, Herbert H. Pollinger