Patents by Inventor Joanne K. Leigh

Joanne K. Leigh 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).

  • Foldable measuring device
    Patent number: 4986464
    Abstract: A measuring device constructed from cellulosic material such as heavy paper or paperboard, metal, or a polymeric material, the material of construction having a predetermined geometric shape with creases segmenting the shaped material to facilitate folding, unfolding and refolding the device, the device being calibrated and useful for measuring particulate materials.
    Type: Grant
    Filed: March 23, 1989
    Date of Patent: January 22, 1991
    Assignee: E. I. du Pont de Nemours and Company
    Inventor: Joanne K. Leigh