Patents by Inventor John T. Rasper

John T. Rasper 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).

  • Process for use in rapidly producing printed circuit boards using a computer controlled plotter
    Patent number: 4720798
    Abstract: A conductor clad board from which the printed circuit board is produced is operatively retained for manipulation in a plotter controlled by a computer. Etchant-resist material is laid down in a printed circuit conductor pattern on at least one conductive sheet of the board by a marking instrument operatively manipulated by the plotter. The computer controls the application of the resist material in accordance with printed circuit board computer aided design information in the computer memory. Both conductive sheets of the board can be marked with resist after establishing the orientation of the board so the printed circuit patterns on opposite sides of the board occupy a predetermined aligned relationship. After etching, the board is again retained in the plotter and holes are drilled through the board by using drill apparatus operatively adapted for use and manipulation by the plotter.
    Type: Grant
    Filed: April 16, 1985
    Date of Patent: January 19, 1988
    Assignee: ProtoCAD, Inc.
    Inventors: Ronald G. Reed, John T. Rasper