Patents by Inventor Lars Goran Torgny Borjesson

Lars Goran Torgny Borjesson 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).

  • Resistance device for a gymnastics apparatus
    Patent number: 3944221
    Abstract: Resistance device for a gymnastics apparatus, comprising an air cylinder and a piston which is movable inside the cylinder. The device is provided with non-return valves in such a manner that, during repeated relative movement of the piston in the cylinder, the air pressure in the device and, thereby, resistance to movement of the piston increases successively.
    Type: Grant
    Filed: March 11, 1974
    Date of Patent: March 16, 1976
    Inventors: Karl-Erik Berkestad, Lars Goran Torgny Borjesson