Patents by Inventor Roberta M. Collins Harper

Roberta M. Collins Harper 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).

  • Pavement marking tape
    Patent number: 5981033
    Abstract: A pavement marking tape having a scrim, wherein the scrim is extensible to enable the tape to conform to irregularities in a road surface, and thereby bond more securely to that surface.
    Type: Grant
    Filed: June 24, 1997
    Date of Patent: November 9, 1999
    Assignee: 3M Innovative Properties Company
    Inventors: Dale H. Haunschild, Neil A. Hodson, Warren J. Johnson, Terrence W. Miller, Larry K. Stump, James H. C. Harper, Roberta M. Collins Harper