Patents by Inventor James H. Jenkins

James H. Jenkins 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).

  • Heat-responsive duct closing method and apparatus
    Patent number: 3990464
    Abstract: A method and apparatus are disclosed for controlling the passage of air, smoke and noxious fumes through the heating and ventilating ducts of a building by means of a normally-collapsed, leak-proof bag which expands upon activation by smoke detection means to completely seal the duct from the passage of air and smoke.
    Type: Grant
    Filed: April 8, 1975
    Date of Patent: November 9, 1976
    Inventor: James H. Jenkins