Patents by Inventor Wallis G. Biesenthal

Wallis G. Biesenthal 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).

  • Portable environmental barrier for an open door-way or window
    Patent number: 4738053
    Abstract: An environmental barrier device which fits between an open door of a building and the door jamb in order to enclose the open space therebetween and through which hoses, electrical wires, tubing, piping, etc., may pass. The device allows access to and egress from the building while in use and yet seals the open space against loss of heat or coolant, and also prevents pets, insects, or the like from passing through the open space during the time the door is necessarily open.
    Type: Grant
    Filed: October 29, 1986
    Date of Patent: April 19, 1988
    Inventor: Wallis G. Biesenthal