Patents by Inventor Marvin L. Drandell

Marvin L. Drandell 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).

  • Variable stencil
    Patent number: 4862597
    Abstract: A stencil is constructed from a stationary envelope and an insert sheet disposed in the envelope but free to be moved with respect to the envelope. The subject matter to be stencilled is cut through the envelope and through the insert sheet. The cuts create openings in the envelope, and when the openings are registered the full subject matter is stencilled. Artistic effects are obtained by moving the sheet slightly out of registry with the envelope and then stencilling.
    Type: Grant
    Filed: May 19, 1988
    Date of Patent: September 5, 1989
    Inventor: Marvin L. Drandell