Patents by Inventor Bruce L. Hartberg

Bruce L. Hartberg 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).

  • Air permeable closure assembly
    Patent number: 4353589
    Abstract: A closure device for the rear of a vehicle which is permeable to air. The embodiment shown is a gridded tailgate for a pickup truck. The open grid forming the surface of the tailgate permits the free flow of air through the tailgate which decreases the wind resistance of the vehicle, reduces drag, increases mileage, allows freedom of vision when hooking anything to the rear of the truck and greatly facilitates backing the vehicle.
    Type: Grant
    Filed: April 6, 1977
    Date of Patent: October 12, 1982
    Inventor: Bruce L. Hartberg