Start a new collection or update your existing one with Uncirculated Philadelphia “P” and Denver “D” mint mark issues featuring the latest 2024 U.S. Innovation dollar design. The newest dollar honors Dr. Bernard Lown’s groundbreaking device, the direct current defibrillator. Developed in 1962, this technological breakthrough allowed for the correction of irregular heart rhythms which often caused fatal heart attacks. This lifesaving tool helped to change the face of modern medicine by paving the way for future cardiac accomplishments including pacemakers and defibrillators that can be placed inside a patient’s chest. Get the latest 2024 dollars, or better yet, buy all 48 coins issued to date and SAVE!