Littmann

Littmann stethoscopes are named after Dr. David Littmann (1906-1981), a Harvard Medical School cardiologist who developed a stethoscope with improved acoustic performance in the early 1960s and founded Cardiosonics, Inc. to sell it. 3M acquired the business in 1967.

The brand introduced its Cardiology stethoscope in 1979 and patented Tunable Technology in 1984, and Littmann remains a leading name in stethoscopes.