Patents by Inventor Torbjorn Stahl

Torbjorn Stahl 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 making overhead projection transparency
    Patent number: 4528054
    Abstract: The present invention provides a method for making overhead projection transparencies. According to the invention there is arranged a first web of a thin transparent plastic film on a second web of paper, said first web being attached along one longitudinal edge thereof by means of a line of adhesive, the upper face of the first web having a writable surface and the lower face thereof having a non-writable surface. In the longitudinal direction of the webs on the first of two sections of said writable surface of the first web, information may be written, e.g. in the form of diagrams, text etc. to be shown by overhead projection, while leaving the second section blank.
    Type: Grant
    Filed: May 30, 1984
    Date of Patent: July 9, 1985
    Assignee: Moore Business Forms, Inc.
    Inventors: Torbjorn Stahl, Per Hektoen, Oystein Karlsen