Patents by Inventor William G. Jeffries

William G. Jeffries 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).

  • Method of welding edges of glass sheets
    Patent number: 4132539
    Abstract: Marginal edge portions of a pair of glass sheets are welded together to make a multiple glazed unit by sequentially imposing a voltage on marginal edge portions of a sheet followed by alternately imposing a voltage on opposed corners of the sheet.
    Type: Grant
    Filed: September 23, 1977
    Date of Patent: January 2, 1979
    Assignee: PPG Industries, Inc.
    Inventor: William G. Jeffries