Olympic symbols Rings". In 1938, the Norwegian brewery Frydenlund patented a label for its root beer which featured the five Olympic rings. In 1952, when Norway was to host the Winter Olympics, the Olympic Committee was notified by Norway's Patent Office that it was Frydenlund who owned the rights to the rings in that country. Today, the successor company Ringnes AS owns the rights to use the patented five rings on its root beer. In addition, a few other companies have been successful in using the Olympic name, such as Olympic Paint, which has a paintbrush in the form of a torch
Iron rings Iron rings Iron rings are heavy metal rings used in martial arts for various training purposes. Metal rings have a long history of being used in Yau Kung Mun, Hung Gar, and other styles for weight training, to harden the muscle, skin, or bone, or strengthen the arms and fists. Many different types of rings are available. The "Chi Sau Ring" is used for conditioning the body in many stances, and exercises. Four-inch-diameter () "Chi Sau Rings" weigh 600 g; iron rings weigh 800 g. Some iron rings are sold in sets, such as two small and two large rings.