Patents by Inventor Sidney Curtis

Sidney Curtis 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).

  • Devices for rotating articles
    Patent number: 4031764
    Abstract: A device for rotating a plurality of articles is formed with a substantially cylindrical passage, two helical paths being defined along the internal surface thereof; the helical paths are located diametrically opposite one another.
    Type: Grant
    Filed: January 26, 1976
    Date of Patent: June 28, 1977
    Assignee: Thomas Hill Engineering Co. (Hull) Ltd.
    Inventor: Sidney Curtis