U.S. federal trademark · Serial No. 73298599 · Reg. No. 1221532
a Lung Exercising Device-Namely, an Apparatus Intended to Aid Persons in the Development of Expansive Strength for Their Lungs, to Increase the Strength of Inhalation, and to Provide an Isometric, Isotonic or Isometric-Isotonic Type of Exercise for the User's Lungs
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