Patents by Inventor William E. Olson

William E. Olson 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).

  • Electric heating apparatus for foundry ladle
    Patent number: 4304986
    Abstract: An electric heater for a foundry ladle wherein a frame is equipped with a descending electric heater operated and controlled to preserve the integrity of the electric heater.
    Type: Grant
    Filed: July 21, 1980
    Date of Patent: December 8, 1981
    Assignee: ESCO Corporation
    Inventor: William E. Olson