Patents by Inventor Francis T. Armstrong

Francis T. Armstrong 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).

  • Multipurpose rucksack
    Patent number: 4239135
    Abstract: A multipurpose rucksack can be opened out into the shape of an elongate rectangle and has an inner lining from which a tent can be erected when the rucksack is opened out with the aid of spacer bars. Conveniently, the rucksack has a pocket to fit over a frame which can be strapped to a wearer and means for receiving the spacer bars whereby the spacer bars can be carried with the rucksack on the frame.
    Type: Grant
    Filed: August 13, 1979
    Date of Patent: December 16, 1980
    Inventor: Francis T. Armstrong