Self-propelled street sweeper truck
The African American called ______ invented the traffic signal in 1916 and _______ invented the first self-propelled street sweeper truck in 1896.
| Garrett Augustus Morgan / Charles Brooks | |
| Johannes Gutenberg / John Atanasoff | |
| Orville and Wilbur Wright / John Froelich | |
| Thomas Edison / Karl Benz | |
| Alexander Graham Bell / John Baird |
