Patents by Inventor Wilco R. Stuhmer

Wilco R. Stuhmer 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).

  • Drawing apparatus and method
    Patent number: 7568916
    Abstract: A drawing apparatus includes a rigid base surface, a flexible drawing surface, and a viscous, sticky medium disposed between the rigid base surface and the flexible drawing surface. Drawings can be formed by applying localized pressure, for example using a finger, fingernail, or stylus, to the flexible drawing surface thereby displacing a portion of the medium to place the drawing surface in near and persistent contact with the rigid base surface. Various color combinations for the medium, rigid base surface, and flexible drawing surface can be used.
    Type: Grant
    Filed: September 8, 2005
    Date of Patent: August 4, 2009
    Inventor: Wilco R. Stuhmer
  • Ice holder incorporated within a beverage container
    Patent number: 5284028
    Abstract: The present invention is a liquid beverage container which keeps the beverages chilled for an extended period of time. The beverage container has two chambers: there is a chamber for the liquid beverage; and there is an ice chamber, sealed with a cap and separated from the liquid beverage chamber by a thin polymeric film pouch, which can be filled with ice to retain the cool liquid beverage.
    Type: Grant
    Filed: December 24, 1992
    Date of Patent: February 8, 1994
    Inventor: Wilco R. Stuhmer