Patents by Inventor Victor Ralph Cunningham

Victor Ralph Cunningham 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).

  • Shoe uppers
    Patent number: 3982335
    Abstract: A shoe upper having in place of the upper leather thereof a fleeceless water vapor permeable microporous sheet of elastomeric polyurethane material having a thickness of about 0.8 - 1.8 mm. and having an extension at break of at least 200%.
    Type: Grant
    Filed: October 12, 1971
    Date of Patent: September 28, 1976
    Assignee: Porvair Limited
    Inventors: Victor Ralph Cunningham, David Leonard Boutle
  • Artificial leather sheet material
    Patent number: 3968293
    Abstract: A water vapor permeable artificial leather material is disclosed which consists essentially of tough microporous elastomeric polymer material free from fibrous reinforcement having a thickness of at least 0.8 mm and a microporous appearance modifying surface layer or finish.
    Type: Grant
    Filed: October 11, 1973
    Date of Patent: July 6, 1976
    Assignee: Porvair Limited
    Inventors: Victor Ralph Cunningham, David Leonard Boutle