Patents by Inventor Michael E. Marr

Michael E. Marr 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).

  • Power assist rack and pinion steering gear
    Patent number: 4351228
    Abstract: Rack and pinion power steering gear in which an internal seal having a diameter smaller than that of the power cylinder is press fitted into a reduced diameter portion of the cylinder using the rack and piston as an installation tool.
    Type: Grant
    Filed: July 2, 1980
    Date of Patent: September 28, 1982
    Assignee: General Motors Corporation
    Inventors: Raymond J. Schultz, Michael E. Marr