Which U.S. vehicle company has a bulldog as its logo?

Mack Trucks, Inc., is an American truck–manufacturing company and a former manufacturer of buses and trolley buses. Founded in 1900 as the Mack Brothers Company, it manufactured its first truck in 1907 and adopted its present name in 1922.

Mack Trucks is a subsidiary of AB Volvo which purchased Mack along with Renault Trucks in 2000. After being founded in Brooklyn, New York, the company's headquarters were in Allentown, Pennsylvania from 1905 to 2009 when they moved to Greensboro, North Carolina. The entire line of Mack products is still produced in Lower Macungie, Pennsylvania, with additional assembly plants in Pennsylvania, Maryland, Australia, and Venezuela. There was also (previously) a Mack plant in Hayward, California.

The company's trademark is the bulldog, which can be found on the front of almost all Mack trucks. A gold-plated bulldog indicates the truck was made with a Mack produced drive train, engine, transmission and drive axles. A chrome bulldog indicates other manufacturers' components were used.

Mack trucks earned their nickname during World War I, when the British government purchased the Mack AC for supplying its front lines. Its pugnacious, blunt-nosed hood, tenacious performance, and durability, reminded the soldiers of their country's mascot, the British Bulldog. The logo was first used in 1921 for the AB chain drive models and became the official corporate logo in 1922.