Patents by Inventor Mark E. Tullis

Mark E. Tullis 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).

  • Roller device for use with pressure sensitive duplicating master and method of operation
    Patent number: 4051778
    Abstract: A device for applying pressure to a pressure sensitive duplicating master and a sheet of copy paper positioned on a hard surface includes two rollers of differing hardness. The rollers are used simultaneously with the harder roller applying substantial duplicating pressure while the softer roller conforms to irregularities in the hard surface and prevents these irregularities from causing voids in the duplicated image.
    Type: Grant
    Filed: June 28, 1976
    Date of Patent: October 4, 1977
    Assignee: The Mazer Corporation
    Inventors: William D. Pflaum, Mark E. Tullis