Patents by Inventor William W. Dupler

William W. Dupler 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).

  • Sheet metal draw die apparatus
    Patent number: 4096729
    Abstract: The sheet metal draw die apparatus disclosed is used with a double-acting press for drawing a planar metal sheet to a predetermined nonplanar drawn article. Both the lower and upper dies consist of spaced-apart modules having only male work contact surfaces formed thereon such that the juxtaposition of the upwardly and downwardly facing male work contact surfaces constitute a distinct, continuous surface defining the drawn article.
    Type: Grant
    Filed: May 31, 1977
    Date of Patent: June 27, 1978
    Assignee: General Motors Corporation
    Inventor: William W. Dupler