Frank J. Sprague
E1873368
UNEXPLORED
Frank J. Sprague was an American engineer and inventor known as a pioneer of electric traction and urban mass transit systems, including electric streetcars and elevators.
All labels observed (1)
| Label | Occurrences |
|---|---|
| Frank J. Sprague canonical | 2 |
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.