Patents by Inventor Mark J. Winfield

Mark J. Winfield 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).

  • Drive transmission part for image forming apparatus
    Publication number: 20140165761
    Abstract: Drive transmission part and system including a coupling member configured to have one or more restricted degrees of freedom, and a gear hub to rotationally engage the coupling member.
    Type: Application
    Filed: December 16, 2013
    Publication date: June 19, 2014
    Applicant: MITSUBISHI KAGAKU IMAGING CORPORATION
    Inventors: Kozo Ishio, William F. Niederstadt, Mark J. Winfield, James H. Rivoir, Jason V. Roberts, Seth R. Brunner, Denny Holmes, Tigran Ohanyan
  • Color toner
    Patent number: 5998079
    Abstract: The invention relates to a color toner composition comprising at least a binder resin and a colorant, and further comprising at least two charge control agents, wherein at least one of said charge control agents is a boron-containing compound, and at least two post-additive compounds used to treat the surface of said color toner.
    Type: Grant
    Filed: May 7, 1998
    Date of Patent: December 7, 1999
    Assignee: International Communication Materials, Inc.
    Inventors: Richard J. Thompson, Mark J. Winfield, Christopher A. Povirk