US Patent 10388180 Finger restraining device for keyboard

A teaching device that teaches a user how to properly use a piano keyboard by restraining the fingers of a hand of the user in a specifically bent orientation. The teaching device includes a wrist band and a restrainer arrangement. The wrist band wraps around the wrist of the hand of the user. The restrainer arrangement is operatively connected to the wrist band and engages the fingers of the hand of the user to teach the user how to properly use the piano keyboard by restraining the fingers of the hand of the user in the specifically bent orientation.