Patents by Inventor Dempsey McGregor

Dempsey McGregor 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).

  • Semiconductor wafer stacking apparatus and method
    Patent number: 5240557
    Abstract: An apparatus stacks semiconductor wafers and spacers and clamps them in an axial alignment for mounting in a semiconductor wafer edge polishing machine. After edge polishing, the apparatus separates the wafers and spacers and delivers them respectively into separate cassettes for further processing or recycling.
    Type: Grant
    Filed: June 1, 1992
    Date of Patent: August 31, 1993
    Assignee: Texas Instruments Incorporated
    Inventors: Lawrence D. Dyer, Dempsey McGregor, Robert M. Montgomery, Jerry B. Medders, Michael R. Head, Tom G. Gullett