Patents by Inventor William H. Thelwell

William H. Thelwell 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).

  • Cutting of corrugated material
    Patent number: 4211131
    Abstract: A method of cutting corrugated material into a plurality of channel shaped bodies in which the material is conveyed by means of guide members parallel to a path along which the material is conveyed. The path is perpendicular to the channels defined by the corrugations and the walls of the channels are severed while the corrugated material is held by the guide members.
    Type: Grant
    Filed: May 3, 1978
    Date of Patent: July 8, 1980
    Assignee: Fibreglass Limited
    Inventors: Cyril P. Fenn, William H. Thelwell