extension element type

Full Title

Exercising apparatus for developing or strengthening the muscles or joints of the body by working against a counterforce, with or without measuring devices > using resilient force-resisters > extension element type

Classification Context

Section:

HUMAN NECESSITIES

Class:

SPORTS; GAMES; AMUSEMENTS

Subclass:

APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT