Patents by Inventor Richard Z. Marlow

Richard Z. Marlow 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).

  • Artificial knee with improved stable link-type knee joint
    Patent number: 4911709
    Abstract: An improved knee prosthesis of the four bar kind employing modified geometry of its links permitting the available degree of flexion to be increased to 143.degree.. A resilient leaf spring provides for extension bias at low angles of flexion, and biases the joint towards its fully flexed position at high angles of flexion. An improved lock for the joint is also provided.
    Type: Grant
    Filed: August 26, 1988
    Date of Patent: March 27, 1990
    Assignee: J. E. Hanger and Company Limited
    Inventors: Richard Z. Marlow, Denis R. W. May
  • Charge pattern development method and apparatus
    Patent number: 4126711
    Abstract: A liquid developer is presented to a charge pattern on a photoconductor surface as an evenly distributed array of droplets passing tangentially to it. The droplets emanate from a series of jets and are spread into an even pattern electromagnetically. The charge pattern is developed by the droplet which it draws to the photoconductor surface.
    Type: Grant
    Filed: September 4, 1975
    Date of Patent: November 21, 1978
    Assignee: Xerox Corporation
    Inventor: Richard Z. Marlow