August Fruehauf
1914The blacksmith who invented the semi-trailer
A Detroit blacksmith and carriage builder, Fruehauf built a single-axle trailer in 1914 to haul a lumber dealer's boat behind a Model T. Because it leaned on the towing vehicle instead of carrying its own front axle, he called it a "semi-trailer" — the direct ancestor of every over-the-road trailer and the chassis that carries containers today.











