Patents by Inventor George R. Heffer

George R. Heffer 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).

  • Fume protection device
    Patent number: 4905684
    Abstract: A fume protection device which allows a person within a room of a smoke filled building to breathe air from outside the building is disclosed.
    Type: Grant
    Filed: May 11, 1987
    Date of Patent: March 6, 1990
    Assignee: Geor-Gina Fume Protection Devices Inc.
    Inventor: George R. Heffer