Patents by Inventor Randall E. Markle

Randall E. Markle 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).

  • Apparatus and method for transporting materials which are to be chemically treated
    Patent number: 5176158
    Abstract: An apparatus and method is disclosed for transporting thin materials, such as printed circuit boards or films, in an etching or other chemical treatment operation whereby a series of guide members, such as wires, which move back and forth in a reciprocating manner, guide the articles being transported through the apparatus and facilitate generally uniform treatment coverage of the articles with a treatment fluid.
    Type: Grant
    Filed: October 29, 1991
    Date of Patent: January 5, 1993
    Assignee: Chemcut Corporation
    Inventors: Karl F. G. Ketelhohn, Randall E. Markle, James J. Ash