U.S. federal trademark · Serial No. 72287992 · Reg. No. 0866475
LUNG EXERCISING DEVICE-NAMELY, AN APPARATUS INTENDED TO AID PERSONS IN THE DEVELOPMENT OF CONTRACTILE STRENGTH FOR THEIR LUNGS, TO INCREASE THE STRENGTH OF EXHALATION, AND TO PROVIDE AN ISOMETRIC, ISOTONIC OR ISOMETRIC-ISOTONIC TYPE OF EXERCISE FOR THE USER'S LUNGS
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