Paul KollsmanBorn: 1900
Altimeter. Prior to 1928, there was no reliable or accurate way for airplane pilots to know how far above the ground they were. The barometric altimeter, accurate within 20 feet, measured altitude by assessing barometric pressure and enabled pilots to fly ?blind.?Died: 1982
|Willem J. Kolff||The National Inventors Hall of Fame||William J. Kroll|
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