Patents by Inventor Edgar Wassmann

Edgar Wassmann 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 for producing drawing stencils
    Patent number: 4225548
    Abstract: A process for producing a drawing stencil characterized in that a plastic border edging is applied, by a spray or injection molding, upon a preformed stencil sheet. A further feature disclosed is the use of a lubricated interface between a border edging and a stencil sheet, to relieve stress buildup and resultant distortion of the stencil.
    Type: Grant
    Filed: October 11, 1978
    Date of Patent: September 30, 1980
    Assignee: Mesne Koh-I-Noor Rapidograph, Inc.
    Inventor: Edgar Wassmann