Complex sentence: Thomas Fogarty, who is also credited with inventing the balloon catheter, is credited with inventing a centrifugal clutch in the 1940s although automobiles were already being manufactured with centrifugal clutches as early as 1936.
Split into simpler sentences: Thomas Fogarty, who also invented the balloon catheter, is credited with inventing a centrifugal clutch in the 1940s. Automobiles were being manufactured with centrifugal clutches as early as 1936.