Patents by Inventor John E. Hanby

John E. Hanby 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).

  • Pressure sensitive recording sheet
    Patent number: 3953642
    Abstract: A pressure sensitive recording sheet adapted for imaging under the pressure of a typewriter key or other writing instrument. The sheet comprises a ply of high surface area polyolefin fibers masking a colored medium therein. The ply of polyolefin fibers when subjected to the localized pressure of a writing instrument becomes relatively transparent in the region where the pressure is applied, to make distinct the colored medium distributed in the recording sheet.
    Type: Grant
    Filed: January 9, 1974
    Date of Patent: April 27, 1976
    Assignee: Crown Zellerbach Corporation
    Inventors: Dennis L. Forbess, John E. Hanby