Patents by Inventor John R. Klopfenstein

John R. Klopfenstein 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).

  • Glass surface coating detector
    Patent number: 5132631
    Abstract: Apparatus and method for detecting the presence and surface location of or the absence of an electrically conductive solar coating on a pane of glass. A capacitor is formed by placing a probe against one surface of the glass. The value of the capacitor is determined by the presence or absence of a conductive coating on the glass and by the location of any coating relative to the probe. Variations in the value of the capacitor are detected to selectively illuminate lights which indicate either the absence of a surface coating, the presence of a surface coating on a near surface or pane of the glass or the presence of a surface coating on a far surface or pane of the glass.
    Type: Grant
    Filed: March 21, 1990
    Date of Patent: July 21, 1992
    Assignee: A. E., Inc.
    Inventors: John R. Klopfenstein, Drew K. Notestine